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1) Which subatomic particle has a positive charge? a) neutron b) anion c) electron d) proton 2) Which subatomic particle has a negative charge? a) neutron b) anion c) electron d) proton 3) Which subatomic particle has no charge? a) neutron b) anion c) electron d) proton 4) How many protons for the element Aluminum if its atomic number is 13? a) 13 b) 16 c) 31 d) 42 5) How many protons in the nucleus for the element Calcium if its atomic number is 20? a) 5 b) 4 c) 8 d) 20 6) Isotopes differ in that? a) They have different number of electrons. b) They have different number of protons. c) They have different number of protons and electrons. d) They have different number of neutrons. e) They have no charge. f) They have positive charges. 7) Is the mass of a single atom. a) Its atomic number b) Number of protons c) The mass number d) Number of neutrons 8) 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 9) If an atom has 8 protons and 7 neutrons in its nucleus then the atomic number of that atom is? a) 7 b) 8 c) 15 d) 22 10) If an atom has 8 protons and 7 neutrons in its nucleus then the mass number of that atom is? a) 7 b) 8 c) 15 d) 22 11) The chemical symbol for the element Sulfur is? a) Su b) SU c) P d) S 12) The chemical symbol for the element Fluorine is? a) FL b) Fl c) F d) Fu 13) The chemical symbol for the element Boron is? a) BO b) B c) Bo d) Bu 14) The chemical symbol for the element Titanium is? a) Ti b) TI c) ti d) Tm 15) The chemical symbol for the element Vanadium is? a) v b) va c) Va d) V

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