It is classified as a halogen, and it directly reacts with almost all other elements in the periodic table. C Statement 1 is correct but statement 2 is not correct. 52 X 23 5224Y Which statement about these atoms is correct? It has 18 electrons. Which statement about W, X, Y and Z is correct? They have different physical properties. A. I and II only B. I and III only C. II and III only D. I, II and III 18. Which statement must be correct? They have the same chemical properties. (b) A neutron is formed by an electron and a proton combining together. The shortest-lived are 29Cl and 30Cl, with half-lives less than 10 … 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? 19 22 19 41. Naturally occurring silver is composed of two stable isotopes, 107Ag and 109Ag. Calculate the... Isotopes of boron containing 7 and 8 neutrons also exist. It is formed by homolytic fission. | Calculate the number of electrons in the ion \(^{{\text{56}}}{\text{F}}{{\text{e}}^{2 + }}\). An isotope is identified by its mass number. Which of the following statements about isotopes is TRUE? Which statements about the isotopes of an element are correct? A.     They have the same mass... A sample of iron has the following isotopic composition by mass. It is an uncharged species. 2.Isotopes of the same element differ only in the number of electrons they contain. Which statements are true for an SN2 reaction? The atom as a whole is neutral iv. It is equal to one-twelfth the mass of the most common isotope. Let’s use x to represent the number of Cl-35 atoms. Markscheme. The relative atomic mass of copper is 63.55. Which species would be deflected most in a mass spectrometer? A 1 and 2 B 2 and 3 C 2 and 4 D 3 and 4 7 Which statement about metals is correct? A Bromide ions act as an oxidising agent. C Chlorine acts as a … Which of the following is true? Neutrons. n = 3 → n = 2. 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. A. I and II only B. I and III only C. II and III only D. I, II and III 18. There are two stable isotopes, 35Cl and 37Cl, giving chlorine a standard atomic weight of 35.45. Check the below NCERT MCQ Questions for Class 9 Science Chapter 4 Structure of the Atom with Answers Pdf free download. What is the number of protons and the number of neutrons in 131I? answer choices . b. (c) The mass of an electron is about 2 0 0 0 1 times that of the proton. It has the same electron arrangement as a chlorine atom. II. Which statement is correct about chlorine-35 and chorine-37? I. English Which quantities are the same for all atoms of chlorine? Which statements about the isotopes of an element are correct? ³⁵Cl₁₇ is found by 75 % and ³⁷Cl₁₇ is found by 25 % by a ratio 3:1. soobee72pl found this answer helpful. 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? All the atoms are stable in their basic state Choose the right option among the following: (a) (i) and (iii) (b) only (ii) They have the same number of protons and electrons, but a different number of neutrons. Which statements are correct? 5 Chlorine exists as two common isotopes, 35Cl and 37Cl. In which set do all the species contain more electrons than neutrons? I. 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.     \(^{16}{{\text{O}}^ +... State the relative mass and charge of the subatomic particles of an atom. State your answers to three... State the number of neutrons present in an atom of \(^{{\text{121}}}{\text{Sb}}\). 30 seconds . 4.Some elements have 3 or more naturally occurring isotopes. Which one of the following statements is not correct? 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? A.   ... What is the relative atomic mass of an element with the following mass spectrum? III. Course Hero is not sponsored or endorsed by any college or university. (b) Isotopes are the atoms of different elements 7. 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 It has a single unpaired electron. With the help of some basic algebra we should be able to figure this out. II. They have the same number of protons and electrons. The fact that LiBr is 7.99 % lithium and 92.01 % bromine by mass regardless of its origin is an example of _____. Which statement about W, X, Y and Z is correct? A Both statements are correct and statement 2 explains statement 1. Isotopes of an element vary in mass because of differing numbers of . burette measuring cylinder A 27.8 42 B 27.8 44 C 28.2 42 D 28.2 44 III. Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true? MCQs from CBSE Class 9 Science Chapter 4: Structure of The Atom 1. 19. C Chlorine acts as a … 19. Which statement about the isotopes of an element is correct? They have the same atomic number. Which of the following correctly lists the elements sodium, silicon, and chlorine in order of decreasing first ionization energy? B. I and III only. It is determined by counting the number of isotopes in a sample of the element. Calculate the relative atomic mass of silicon... Deduce the numbers of protons and electrons in the ion \({\text{C}}{{\text{o}}^{2 + }}\). The isotope Cl-35 makes up 75.8% of the sample, and the isotope Cl-37 makes up 24.3% of the sample. 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. In the emission spectrum of hydrogen, which electronic transition would produce a line in the. Which of the following statements is incorrect about the structure of an atom? Statement 2: Alloys are made by mixing molten metals together and allowing them to cool. The isotopes of an element have the same number of protons, but different numbers of neutrons. A€€€€€€€The first ionisation energy of iron is greater than its second ionisation energy. Which statement is not correct in case of isotopes of chlorine 17Cl35 and 17Cl37 5.Isotopes of the same element have the same … Answer Answer: (b) Q.7. They have the same chemical properties. 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. For the following statements, write T for True and F for False. i. (a) J.J.Thomson proposed that the nucleus of an atom contains only nucleons. (a) Size of an element (b) Valency of an element (c) Molar mass of the element (d) None of these. B Both statements are correct but statement 2 does not explain statement 1. Titanium exists as several isotopes. This is because chlorine contains two different isotopes, chlorine-35 and chlorine-37. It is an uncharged species. Chlorine is a chemical element with atomic number 17 and an atomic weight of 35.4527 grams per mole. Which of the following statements about isotopes is incorrect? 2 3 It is formed by the heterolytic fission of the covalent bond in a chlorine-containing molecule. 4 Both substances have very high melting points. They have the same chemical properties. Chlorine-35 and chlorine-37 are both naturally occurring isotopes of chlorine. Calculate... State the nuclear symbol notation, \({}_Z^AX\), for magnesium-26. The reaction is exothermic. 9. A Bromide ions act as an oxidising agent. I and II only. II. Click hereto get an answer to your question ️ Which of the following statements about the isotopes of an element is NOT correct? The relative atomic mass of boron is 10.8, to three significant figures. 18 Chlorine displaces bromine from aqueous potassium bromide. The ionic equation for the reaction is shown. 2 There are strong covalent bonds in diamond. C chlorine 71 D hydrogen 2 2 The diagrams show liquids in a burette and a measuring cylinder. III. Which of the following statements about isotopes is/are correct? Which statement about an element’s average atomic mass is correct? International Baccalaureate® - Baccalauréat International® - Bachillerato Internacional®. The ionic equation for the reaction is shown. Which is an isotope of 24Mg? law of definite proportions. 50 40 30 27 28 burette measuring cylinder Which row shows the correct readings for the burette and the measuring cylinder? b. Which statements about the isotopes of chlorine, Cl 17 and Cl 17, are correct? 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. It has 18 electrons. 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