1) What is the charge of a proton? a) Positive (+1) b) Negative (-1) c) Neutral (0) 2) What is the charge of an electron? a) positive (+1) b) negative (-1) c) neutral (0) 3) Protons and neutrons live in the ______ a) neutrons b) electron cloud c) nucleus d) valence shell 4) The outermost part of an atom is called the ___________ a) valence shell b) electron cloud c) nucleus 5) Protons and neutrons have about the same mass. True or false? a) True b) False 6) Most of an atom's mass in located in the a) electron cloud b) nucleus c) valence shell 7) What determines an atoms identity? a) protons b) neutrons c) nucleus d) electron shells 8) Where are protons located? a) nuclues b) outer shell 9) Where are neutrons located? a) nucleus b) outer shell 10) Where are electrons located? a) nucleus b) electron cloud 11) What is the charge of a neutron? a) positive b) negative c) neutral 12) This is a model of Sodium. How many valence electrons does it have? a) 11 b) 8 c) 2 d) 1 13) This is a sodium atom. What is the chemical symbol for sodium? a) S b) Na c) So

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