1) If atoms contain charged particles, why do they not have a charge? a) They contain the same number of protons as electrons b) The charge is locked away in the nucleus c) They contain equal numbers of protons and neutrons 2) Which of the three sub-atomic particles is the lightest? a) The proton b) The electron c) The neutron d) the atom e) the isotopes 3) What is the atomic number of an atom equal to? a) The number of protons in the nucleus b) The number of neutrons in the nucleus c) The numbers of protons and neutrons in the nucleus 4) Where are the electrons inside an atom? a) The electrons are in the nucleus of an atom b) They are arranged in energy levels c) The electrons are spread equally throughout the atom 5) Which elements have similar chemical properties? a) Elements in the same period of the Periodic Table b) Elements with the same number of electrons in their outer energy level c) Elements with similar mass numbers 6) How many neutrons does this atom of carbon have? (hint: M-A=N Mass # - Atomic # = Neutrons) a) 6 b) 8 c) 14 d) 2 e) 16 f) 9 7) What are isotopes? a) Compounds with the same molecular formula but different structural formula b) Atoms with the same mass number but different atomic number c) Atoms with the same number of protons but a different number of neutrons 8) What is the center of an atom called? a) The protons  b) The electrons  c) The neutrons  d) The nucleus  e) Hydrogen  f) isotopes 9) What is the charge on an electron? a) positive one b) negative one  c) neutral  d) molecules e) isotopes 10) What is the mass number of sodium? (Don't forget to round.) a) 223 b) 23 c) 22 d) 24 e) 11 11) Atoms of the same element must always have the same number of _________ a) electrons b) neutrons c) protons d) isotopes 12) The dense, positively charged mass located in the center of the atom. a) nucleus  b) isotope  c) protons d) electrons e) neutral 13) The _________ of an element equals the number of protons in an atom of that element a) mass number b) atomic number c) atomic weight d) isotopes

Atomic Structure Quiz Game

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