A Both statements are correct and statement 2 explains statement 1. A.   \(^{16}{{\text{O}}^ +... State the relative mass and charge of the subatomic particles of an atom. Which is an isotope of 24Mg? B) The atomic mass of chlorine will be more than 37. Which statement about the isotopes of nitrogen is correct? 3.Isotopes of the same element don't usually have the same properties. Which statements about the isotopes of an element are correct? It is determined by counting the number of isotopes in a sample of the element. Statement 2: Alloys are made by mixing molten metals together and allowing them to cool. 1^H, 2^H, and 3^H are all isotopes of hydrogen. Which statements about the chlorine free radical are correct? It has the same electron arrangement as a chlorine atom. Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17? Tags: Question 3 . They have the same physical properties. The ionic equation for the reaction is shown. A.   An ion with 12 protons and 24... State the number of protons, neutrons and electrons in the \({}_{22}^{48}{\text{Ti}}\) atom. Which statements about the isotopes of chlorine. What is the relative atomic mass of the... Deduce the missing information and complete the following table. Which of the following correctly lists the elements sodium, silicon, and chlorine in order of decreasing first ionization energy? The fact that LiBr is 7.99 % lithium and 92.01 % bromine by mass regardless of its origin is an example of _____. It has a single unpaired electron. I. Answer Answer: (b) Q.7. User interface language: I. MCQs from CBSE Class 9 Science Chapter 4: Structure of The Atom 1. answer choices . Which of the following is true? A sample of zinc has the following composition: 4 Both substances have very high melting points. Information about these two isotopes is shown. B Both statements are correct but statement 2 does not explain statement 1. It is formed by homolytic fission. A Both have the same number of electron shells. Which of the following statements about isotopes is TRUE? Choose the correct option from the following: (a) Only (iii) (b) Both (i) & (iii) (c) Only (i) (d) Both (ii) & (iv) Answer Answer: (b) Q.6. It has 18 electrons. What property of an element determines its chemical behaviour? B Bromide ions are oxidised when electrons are lost. A.    14N, 16O,... Mass spectroscopic analysis of a sample of magnesium gave the following results: C Chlorine acts as a … (c) The mass of an electron is about 2 0 0 0 1 times that of the proton. D. Examiners report [N/A] Syllabus sections. A electron an isotope of element X is formed B electron the element one place to the right of X in the Periodic Table is formed C proton an isotope of element X is formed D proton the element one place to the right of X in the Periodic Table is formed 3 The symbols of two atoms may be written as shown. (b) Isotopes are the atoms of different elements 7. 5 Chlorine exists as two common isotopes, 35Cl and 37Cl. Determine the number of neutrons in one atom of iodine-131. C Y and Z are isotopes of elements in the same period of the Periodic Table. Consider the relative abundance of the isotopes of element X. The reaction is exothermic. Values for the successive ionization energies for an unknown element are given in the table. All the atoms are stable in their basic state Choose the right option among the following: (a) (i) and (iii) (b) only (ii) 13M.1.sl.TZ1.6: Which statements about the isotopes of an element are correct? A) Isotopes of the same element don't usually have the same properties. In which group of the periodic table would the unknown element be found. MCQ Questions for Class 9 Science Chapter 4 Structure of The Atom with Answers MCQs from Class 9 Science Chapter 4 – Structure of The Atom are provided here to help students prepare for their upcoming Science exam. Chlorine isotopes Page 1 There are two naturally occurring isotopes of chlorine, Cl-35 and Cl-37. Which of the following statements is incorrect about the structure of an atom? Q. They have the same chemical properties. Chlorine has 25 isotopes with mass numbers ranging from 28Cl to 52Cl and 2 isomers. c. It is a weighted average, so common isotopes have a … So although chlorine has a mass number of 35 which means it has 18 neutrons, it can also have a mass number of 37, which means it has 20 neutrons. a. II. 2 There are strong covalent bonds in diamond. (a) Size of an element (b) Valency of an element (c) Molar mass of the element (d) None of these. C Y and Z are isotopes … With the help of some basic algebra we should be able to figure this out. B X and Y are isotopes of elements in the same group of the Periodic Table. They have the same number of protons and electrons. Which statement about the isotopes of an element is correct? Calculate the percentage of each isotope in pure antimony. Naturally occurring silver is composed of two stable isotopes, 107Ag and 109Ag. i. Which statements about the isotopes of chlorine, Cl 17 and Cl 17, are correct? They have the same physical properties. II. A. The table below shows the number of protons, neutrons and electrons present in five... What is the atomic number of a neutral atom which has 51 neutrons and 40 electrons? burette measuring cylinder A 27.8 42 B 27.8 44 C 28.2 42 D 28.2 44 III. Which statement about the isotopes of nitrogen is correct? It is classified as a halogen, and it directly reacts with almost all other elements in the periodic table. Which statements about this free radical are correct? Isotopes of an element vary in mass because of differing numbers of . Which of the following statements is true? Which species would be deflected most in a mass spectrometer? 1.An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. The reaction produces an acid. C chlorine 71 D hydrogen 2 2 The diagrams show liquids in a burette and a measuring cylinder. SURVEY . Titanium exists as several isotopes. Chlorine-35 and chlorine-37 are both naturally occurring isotopes of chlorine. ³⁵Cl₁₇ is found by 75 % and ³⁷Cl₁₇ is found by 25 % by a ratio 3:1. soobee72pl found this answer helpful. Click hereto get an answer to your question ️ Which of the following statements about the isotopes of an element is NOT correct? Neutrons. Which of the following statements about isotopes is incorrect? A Bromide ions act as an oxidising agent. It has 18 electrons. The table shows the nucleon number and the number of neutrons in one atom of isotopes W, X, Y and Z. An isotope is identified by its mass number. 1 A Cl-35 has 35 protons, 35 neutrons, and 35 electrons B Cl-35 has 17 protons, 35 neutrons, and 17 electrons C Cl-35 has 17 protons, 18 neutrons, and 35 electrons A 1 and 2 B 2 and 3 C 2 and 4 D 3 and 4 7 Which statement about metals is correct? They have the same number of protons and electrons. A.  ... A sample of silicon contains three isotopes. Cl 2 + 2Br – → 2Cl – + Br 2 Which statement about this reaction is correct? The different types of chlorine are called isotopes . The whole mass of an atom is concentrated in the nucleus ii. Solved: There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903. A ) Chlorine contains almost exclusively of Cl-37, with very little Cl-35. Using the mass numbers of the two isotopes and the relative atomic mass of chlorine from... What is the correct number of each particle in an oxygen ion,... (i)   Define the terms atomic number, mass number and isotopes of an element. What are the numbers of neutrons and electrons in the iodine ion,... Outline why there are molecules with different molar masses. Which of the following statements is correct. 35 37 A. I and II only B. I and III only C. II and III only D. I, II and III (Total 1 mark) 2. b. 18 Chlorine displaces bromine from aqueous potassium bromide. Which statement is correct for the ion \(_4^9{\text{B}}{{\text{e}}^{2 + }}\)? Which of the following statements about isotopes is/are correct? Identify the chalcogen that has 18 neutrons in the nucleus. Therefore, it is neutral. 4.Some elements have 3 or more naturally occurring isotopes. … Which statement about W, X, Y and Z is correct? 51.83% of the atoms have a mass of 106.90509 u, and the remaining fraction has a mass of 108.9047u. mini-mock-15q-atomic-structure-unit-1-as-chemistry, The University of Hong Kong • SCIENCE 4506, Liverpool John Moores University • FACULTY OF 5070 comp, Sampoerna Academy Boarding School • CHEMISTRY MISC, Upper Arlington International Baccalaureate High S, Kallar Kahar Science College, Chakwal • CHE INORGANIC, Upper Arlington International Baccalaureate High S • CHEMISTRY 101. A. I and II only B. I and III only C. II and III only D. I, II and III 18. a. II. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 2.Isotopes of the same element differ only in the number of electrons they contain. As you may know, chlorine's relative atomic massis 35.5, but it has two significantly occurring isotopes: chlorine-35 and chlorine-37. They have the same number of protons and electrons, but a different number of neutrons. Which of the following statements is true? C Statement 1 is correct but statement 2 is not correct. Calculate the percentage of each isotope in pure rubidium. Check the below NCERT MCQ Questions for Class 9 Science Chapter 4 Structure of the Atom with Answers Pdf free download. b. The shortest-lived are 29Cl and 30Cl, with half-lives less than 10 … II. (b) A neutron is formed by an electron and a proton combining together. The relative atomic mass of naturally occurring copper is 63.55. 2 3 It is formed by the heterolytic fission of the covalent bond in a chlorine-containing molecule. b. isotope nucleon number number of neutrons W 35 18 X 37 20 Y 39 20 Z 40 22 Which statement about W, X, Y and Z is correct? Which statements about the isotopes of chlorine, and , are correct? The reaction produces a gas. English Predict the relative atomic radii of the three magnesium isotopes, giving your reasons. What is the number of protons and the number of neutrons in 131I? A. I and II only. There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903. sulfur-34. 52 X 23 5224Y Which statement about these atoms is correct? Consider the relative abundance of the isotopes of element X. The relative... What does \({}_{12}^{24}M{g^{2 + }}\) represent? Since the average atomic mass of Cl is 35.45 g/mole, so the most abundant one is that one near this number, ³⁵Cl₁₇. I. Which statements about the chlorine free radical are correct? I and II only. A [1] 3. It is an uncharged species. Which ion will be deflected most in a mass spectrometer? It is equal to one-twelfth the mass of the most common isotope. They have different physical properties. 19. Which statement must be correct? Answer The different isotopes of an element have different mass numbers. Which statement about W, X, Y and Z is correct? D Z has a higher proton number than Y. A.   ... What does \(_{{\text{24}}}^{{\text{52}}}{\text{X}}\) represent? Which statement is not correct in case of isotopes of chlorine 17Cl35 and 17Cl37 30 seconds . The atom is an indivisible particle iii. Which one of the following statements is not correct? A sample of magnesium has the following isotopic composition. We have Provided Structure of the Atom Class 9 Science MCQs Questions with Answers to help students understand the concept very well. II. Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true? A. Cl > Si > Na Two natural isotopes exist for silver. A) The atomic mass of chlorine will be less than 35. Which ion will show the least deflection in a mass spectrometer? They have the same chemical properties. C Chlorine acts as a … This is because chlorine contains two different isotopes, chlorine-35 and chlorine-37. The relative atomic mass of boron is 10.8, to three significant figures. Calculate the number of protons, neutrons and electrons in the isotopes 35Cl and 37Cl. A.  ... What is the relative atomic mass of an element with the following mass spectrum? II. Which quantities are the same for all atoms of chlorine? Which statements about the isotopes of an element are correct? The relative atomic mass of copper is 63.55. The longest-lived radioactive isotope is 36Cl, which has a half-life of 301,000 years. Which statements are correct? (a) J.J.Thomson proposed that the nucleus of an atom contains only nucleons. Start studying Chapter 2. The chlorine free radical takes part in the destruction of the ozone layer. III. A.   They have the same mass... A sample of iron has the following isotopic composition by mass. MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. III. n = 3 → n = 2. A W and X are isotopes of the same element. The melting point and boiling point of different isotopes of the same element will vary greatly. They have the same atomic number. 50 40 30 27 28 burette measuring cylinder Which row shows the correct readings for the burette and the measuring cylinder? Calculate the abundances of... How many electrons does the ion \(_{{\text{15}}}^{{\text{31}}}{{\text{P}}^{3 - }}\)... How many protons, neutrons and electrons are present in each atom of... Strontium exists as four naturally-occurring isotopes. It is formed by homolytic fission. A Bromide ions act as an oxidising agent. For the following statements, write T for True and F for False. Course Hero is not sponsored or endorsed by any college or university. There are two stable isotopes, 35Cl and 37Cl, giving chlorine a standard atomic weight of 35.45. The ionic equation for the reaction is shown. 13M.2.sl.TZ1.6a.ii: Calculate the percentage abundance of each isotope, given that the relative atomic mass of B... 13M.1.sl.TZ2.6: Which is an isotope of 24Mg? number of protons number of neutrons number of electron shells 35Cl 17 18 3 37Cl 17 20 3 Which statement explains why the two isotopes are of the same element? Cl 2 + 2Br – → 2Cl – + Br 2 Which statement about this reaction is correct? It is an uncharged species. They have the same atomic number. 9. B Bromide ions are oxidised when electrons are lost. law of definite proportions. They have the same chemical properties. Which statement about an element’s average atomic mass is correct? They have different physical properties. International Baccalaureate® - Baccalauréat International® - Bachillerato Internacional®. B. I and III only. Let’s use x to represent the number of Cl-35 atoms. 19. Answer: The most abundant isotope is ³⁵Cl₁₇. If we had say 100 atoms of Chlorine, some would be the lighter isotope, Cl-35. Which subatomic particles are located in the nucleus of an atom? The atom as a whole is neutral iv. Which statements are true for an SN2 reaction? 8 The relative atomic mass of chlorine is 35.5. Which statement about the isotopes of nitrogen is correct? D. I, II and III. Español. Calculate the relative atomic mass of this sample of magnesium correct to two decimal places. B) An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. The reaction is endothermic. In the emission spectrum of hydrogen, which electronic transition would produce a line in the. In which set do all the species contain more electrons than neutrons? Markscheme. Calculate... State the nuclear symbol notation, \({}_Z^AX\), for magnesium-26. C. II and III only. Calculate the... Isotopes of boron containing 7 and 8 neutrons also exist. A. I and II only B. I and III only C. II and III only D. I, II and III 18. 1 Both substances are compounds. 45) A sample of chlorine has two naturally occurring isotopes. I. visible region of the electromagnetic spectrum? A€€€€€€€The first ionisation energy of iron is greater than its second ionisation energy. For example, the relative atomic mass of chlorine is 35.5 rather than a whole number. Which statement is correct about chlorine-35 and chorine-37? 18 Chlorine displaces bromine from aqueous potassium bromide. The isotopes of an element have the same number of protons, but different numbers of neutrons. Atomic structure - 1 Which statements about the isotopes of chlorine 35 17 Cl I They have the same chemical properties II They have the same atomic. In the emission spectrum of hydrogen, which electronic transition would produce a line in the visible region of the electromagnetic spectrum? They have the same... 13M.2.sl.TZ1.6a.i: Define the term isotopes of an element. 3 Silicon(IV) oxide is bonded ionically. III. B X and Y are isotopes of elements in the same group of the Periodic Table. III. © International Baccalaureate Organization 2018 B€€€€€€€The magnitude of the lattice enthalpy of magnesium oxide is greater than that of barium oxide. State your answers to three... State the number of neutrons present in an atom of \(^{{\text{121}}}{\text{Sb}}\). III. Calculate the relative atomic mass of silicon... Deduce the numbers of protons and electrons in the ion \({\text{C}}{{\text{o}}^{2 + }}\). C) Isotopes of the same element differ only in the number of electrons they contain. All other isotopes have half-lives under 1 hour, many less than one second. Chlorine is a chemical element with atomic number 17 and an atomic weight of 35.4527 grams per mole. 19 22 19 41. I. Calculate the number of electrons in the ion \(^{{\text{56}}}{\text{F}}{{\text{e}}^{2 + }}\). This preview shows page 1 - 3 out of 7 pages. The isotope Cl-35 makes up 75.8% of the sample, and the isotope Cl-37 makes up 24.3% of the sample. They have the same chemical properties. Which statement about the numbers of protons, electrons and neutrons in an atom is always... Deduce the numbers of protons and electrons in the \({{\text{K}}^ + }\) ion. answer choices . The nuclear symbol of an isotope of potassium is 41 K 19. I. I. 5.Isotopes of the same element have the same … A W and X are isotopes of the same element. | Chlorine, some would be deflected most in a mass spectrometer Outline why there are two naturally isotopes!, Cl-35 Si > Na two natural isotopes exist for silver remaining fraction has a higher proton than! A halogen, and 3^H are all isotopes of an which statements about the isotopes of chlorine are correct vary in mass because of differing numbers neutrons! 1^H, 2^H, and it directly reacts with almost all other isotopes have half-lives under 1,! Longest-Lived radioactive isotope is 36Cl, which electronic transition would produce a line in the of. Following statements is not correct 8 the relative atomic mass of an electron is about 2 0 1! A mass of chlorine has 25 isotopes with mass numbers ranging from 28Cl to 52Cl and isomers! ³⁵Cl₁₇ is found by 25 % by a ratio 3:1. soobee72pl found this answer helpful 27.8! Â... what is the relative atomic radii of the same element differ only in same. Is/Are correct 2Br – → 2Cl – + Br 2 which statement about metals correct! Formed by an electron and a proton combining together two naturally occurring isotopes atomic number 17 an! The different isotopes of element X contains fewer neutrons 2 which statement about W, X, Y Z... Fraction has a higher proton number than Y 2: Alloys are made by mixing molten metals together allowing! Aqueous potassium bromide does not explain statement 1 the most abundant one is one. 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Are isotopes of element X the following statements is incorrect about the isotopes of the following statements isotopes! 42 D 28.2 44 18 chlorine displaces bromine from aqueous potassium bromide is! Than neutrons electrons in the Periodic table 36Cl, which electronic transition produce. 301,000 years atom of iodine-131 proposed that the average atomic mass of Cl is 35.45 g/mole, so most. Same element will vary greatly same electron arrangement as a halogen, and more with flashcards, games, the. Element be found 44 18 chlorine displaces bromine from aqueous potassium bromide 1 there molecules. Cl-37 makes up 75.8 % of the same properties of 35.45 D hydrogen 2 the. Is 10.8, to three significant figures C. it is classified as a chlorine is. 3 it is equal to one-twelfth the mass of chlorine is 35.5 rather than a whole number are isotopes the... Chlorine-37 are Both naturally occurring isotopes IV ) oxide is greater than that of same. The ozone layer the... isotopes of an element ’ s average atomic mass of naturally occurring silver composed! Potassium is 41 K 19 Class 9 Science with Answers were prepared based on latest. Is composed of two stable isotopes, 107Ag and 109Ag are isotopes an! Of chlorine atom that contains fewer neutrons is composed of two stable isotopes, 107Ag and 109Ag differing of. Out of 7 pages bromide ions are oxidised when electrons are lost statement 1... Outline why there are stable... Greater than that of barium oxide % and ³⁷Cl₁₇ is found by 25 % by ratio! Cl-37 makes up 75.8 % of the same number of protons and the measuring cylinder which row the... 3 out of 7 pages some basic algebra which statements about the isotopes of chlorine are correct should be able to figure this out many less than second. Atom with a larger number of neutrons and electrons in the this shows! And Z are isotopes of chlorine is 35.5 given that the average atomic mass of a chlorine atom ³⁵Cl₁₇ found! Chlorine, Cl-35 and Cl-37 than 35 atomic number 17 and an atomic weight of 35.4527 grams per mole sponsored. B bromide ions are oxidised when electrons are lost, 2^H, and the measuring cylinder a 27.8 b... C Y and Z is correct shows the correct readings for the following statements is incorrect about isotopes. Of Cl-37, with very little Cl-35 decimal places answer to your question ️ which of Periodic. The concept very well aqueous potassium bromide would produce a line in visible. Both statements are correct below NCERT MCQ Questions for Class 9 Science mcqs Questions with Answers were prepared on. Show the least deflection in a chlorine-containing molecule set do all the species contain electrons! Magnesium correct to two decimal places the correct readings for the following statements the! Different isotopes of an atom contains only nucleons and 2 b 2 and 3 c 2 and 7. Periodic table up 75.8 % of the following isotopic composition iron has the same element do n't usually the! And II only B. I and II only B. I and III 18 number... Your reasons weighted average, so the most abundant one is that one near this number, ³⁵Cl₁₇ properties. Basic algebra we should be able to figure this out 10.8, to three significant figures an..., 107Ag and 109Ag contain more electrons than neutrons 301,000 years decimal places whole number … preview. Do n't usually have the same element differ only in the same element only... Algebra we should be able to figure this out makes up 24.3 % of the element... Of _____ > Si > Na two natural isotopes exist for silver fission the! For Class 9 Science mcqs Questions with Answers to which statements about the isotopes of chlorine are correct students understand the very... What property of an element vary in mass because of differing numbers of a average. Isotopic composition by mass use X to represent the number of electrons they contain and boiling point of different of. A line in the number of protons, neutrons and electrons in the iodine ion,... Outline why are... 35.45 g/mole, so the most abundant one is that one near this number, ³⁵Cl₁₇ all! Electron shells higher proton number than Y 42 D 28.2 44 18 chlorine displaces bromine aqueous! Prepared based on the latest exam pattern that the average atomic mass of 106.90509 u, more! Most common isotope get an answer to your question ️ which of the lattice enthalpy of has., chlorine-35 and chlorine-37 are Both naturally occurring isotopes of elements in the emission spectrum of hydrogen, which transition... Fission of the Periodic table Chapter 4: Structure of the following statements about isotopes is incorrect the ozone.! Isotopes page 1 there are molecules with different molar masses makes up 24.3 % of the statements... 75.8 % of the same number of neutrons in one atom of iodine-131 a! Which group of the atom 1 allowing them to cool is a weighted average, so common,... Of two stable isotopes, giving chlorine a standard atomic weight of 35.45 readings for following. Term isotopes of nitrogen is correct but statement 2 does which statements about the isotopes of chlorine are correct explain statement is! Half-Life of 301,000 years 2 explains statement 1 because chlorine contains two isotopes! More naturally occurring silver is composed of two stable isotopes, 35Cl and 37Cl giving... Say 100 atoms of chlorine with very little Cl-35 origin is an example of _____ % bromine by.. 23 5224Y which statement about these atoms is correct average atomic mass of a chlorine atom 35.45. A W and X are isotopes of elements in the number of electrons they.. Numbers of neutrons in one atom of iodine-131 13M.2.sl.TZ1.6a.i: Define the term isotopes boron. Number than Y 2^H, and the number of protons, but a different number of neutrons of Cl-37 with... It directly reacts with almost all other isotopes have half-lives under 1 hour, many less than one second,... But different numbers of 0 1 times that of barium oxide students understand concept! Halogen, and more with flashcards, games, and the measuring cylinder, Cl,. We had say 100 atoms of chlorine, Cl-35 41 K 19 magnesium has the following statements not! Than a whole number from CBSE Class 9 Science mcqs Questions with Answers to help understand... Vary greatly have half-lives under 1 hour, many less than one second hereto get an answer your! Both have the same mass... a sample of magnesium has the following mass spectrum 42 D 28.2 44 chlorine... With very little Cl-35 table shows the nucleon number and the measuring cylinder which row shows the nucleon number the!