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1) Which of the following has a positive charge? a) neutron b) anion c) electron d) proton 2) Which of the following has a negative charge? a) neutron b) anion c) electron d) proton 3) Which of the following has no charge? a) neutron b) anion c) electron d) proton 4) An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct? a) An atom of sodium has 13 neutrons. b) An atom of sodium has 11 neutrons. c) An atom of sodium has 12 neutrons. d) An atom of sodium has 8 neutrons. 5) An atom of phosphorus has an atomic number of 15 and a mass number of 31. How many neutrons does it contain? a) 15 b) 16 c) 31 d) 42 6) What is the chemical symbol for magnesium? a) Ma b) Mn c) M d) Mg 7) 'Different isotopes of the same element have, when neutral...' a) ...the same number of protons, but differing numbers of neutrons and electrons b) ..the same number of neutrons, but differing numbers of protons and electrons c) ...the same number of protons and neutrons, but differing numbers of electrons d) ...the same number of protons and electrons, but differing numbers of neutrons 8) The mass of a single atom of a particular isotope is called which of the following? a) Its atomic number b) Its atomic weight c) Its atomic mass d) Its relative atomic mass 9) The identity of a chemical element is determined by which of the following? a) The number of protons it possesses b) The number of neutrons it possesses c) The number of electrons it possesses d) The sum of the number of protons and neutrons it possesses 10) The atomic symbol for iron is a) Ir b) If c) Fe d) Iron 11) The atomic symbol K stands for... a) Krypton b) Potassium c) Tin d) Magnesium 12) The atomic symbol Mo stands for... a) Manganese b) Molybdenum c) Meitnerium d) Magnesium 13) The atomic symbol W stands for... a) Rutherfordium b) Tungsten c) Niobium d) Zirconium 14) The atomic symbol Pd stands for... a) Scandium b) Silver c) Palladium d) Potassium 15) The atomic symbol V stands for... a) Cobalt b) Nickel c) Palladium d) Vanadium

Atomic Structure 2

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