1) Which of the following does the nucleus contain? a) protons and electrons b) protons and neutrons c) neutrons and electrons 2) Which of the following statements is correct? a) Protons have a positive charge and neutrons are negative b) Protons have a negative charge and electrons are positive c) Protons have a positive charge and electrons are negative 3) What is the atomic number? a) The number of atoms it contains? b) The number of protons it contains? c) The number of neutrons it contains? 4) In an atom: a) number of protons = number of electrons b) number of protons = number of neutrons c) Number of neutrons = number of electrons 5) A neturon has what charge? a) no charge b) positive c) negative 6) What is the mass of an electron a) 1 b) -1 c) 0 7) What is the mass on a neutron? a) 1 b) -1 c) 0 8) What is the charge on a neutron? a) +1 b) -1 c) 0 9) What is the mass of a proton? a) 1 b) -1 c) 0 10) What is the charge on a proton? a) +1 b) -1 c) 0 11) what is an isotope? a) same number of protons, different number of electrons b) same number of protons, different number of neutrons c) same number of neutrons, different number of protons 12) What is an ion? a) a charged atom b) something to flatten a shirt c) an atom with different number of protons 13) An ion gains an electron. What charge does it now have? a) positive b) negative c) no charge 14) An ion loses an electron. What charge does it now have? a) positive b) negative c) no charge 15) What is the mass of an electron a) 1 b) -1 c) 1/1836 16) Carbon has 6 electrons. What is its electron configuration? a) 6 b) 2, 4 c) 4, 2 d) 3, 3 17) Potassium has 19 electrons. What is its electron configuration? a) 2, 8, 9 b) 2, 8, 5, 4 c) 2, 8, 8, 1 d) 9. 8. 1 18) What do carbon 12 and carbon 14 have in common? a) same number of protons b) same number of neutrons c) same number of protons and neutrons d) same number of protons and electrons 19) An ion of lithium has a charge of +1. What does this tell us? a) It has more neutrons than protons b) It has more electrons than protons c) It has more protons than electrons d) It has more protons than neutrons 20) An ion of oxygen has a charge of -2. What does this tell us? a) It has more neutrons than protons b) It has more electrons than protons c) It has more protons than electrons d) It has more protons than neutrons

AW Yr 9 Atomic Structure

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