UNIT 3 VOCABULARY MATCHING

WORD BANK
(A) electron            (B) neutron            (C) proton            (D) atomic number
(E) mass number     (F) isotope             (G) nucleus          (H) Dalton
(I) electron cloud     (J) Thomson          (K) Bohr               (L) Rutherford

____ 1.) center part of an atom; contains almost all of the mass of an atom   G

____ 2.) equal to the number of protons in an atom; whole number on the Periodic Table     D

____ 3.) equal to the number of protons plus the number of neutrons in an atom                E

____ 4.) discovered the electron using a cathode ray tube                   J

____ 5.) atoms of the same element, but have different masses                   F

____ 6.) negatively-charged subatomic particle              A

____ 7.) part of the atom that surrounds the center; accounts for almost all of the volume of an atom       I

____ 8.) discovered the nucleus with the gold foil experiment               L

____ 9.) positively-charged subatomic particle               C

____ 10.) established that atoms of one element are not changed into atoms of another element in a
               chemical reaction          H

____ 11.) hypothesized that electrons travel around the center of the atom in particular paths         K

____ 12.) subatomic particle with no charge                  B

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