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Unformatted text preview: 1 . N 2 . 2N 2 3 . N 2 4 . 2N Answer: 2 Question 7 Almost the entire mass of an atom is concentrated in the__________. 1 proton . 2 . electron s 3 . nucleus 4 . neutrons Answer: 3 Question 8 Question: Electron was discovered by___________. 1 . Chadwic k 2 . Thomso n 3 . Goldstei n 4 . Bohr Answer: 2 Question 9 Question: An atom has a mass number of 23 and atomic number 11. The number of protons are_________. 1 . 1 1 2 . 1 2 3 . 2 3 4 . 4 4 Answer: 1 Question 10 Question: The mass of the atom is determined by________. 1 . Neutrons 2 . neutron and proton 3 . Electron 4 . electron and neutron Answer: 2...
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 Spring '11
 Masror
 Atom, Proton, Neutron, Usama Farooq

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