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Science Test 2/3/09
any substance that takes up space and has mass
smallest part of a compound
made up of two or more elements
How many electron shells
How many valence electrons are in the last valence shell
# of protons
# of protons + # of neutrons
# of Neutrons
# of protons - atomic mass
Having no inherent power of action, motion, or resistance
Variation in an atom of an element with different # of neutrons
When an atom or molecule loses or gains an electron so that it becomes a charged particle
Attraction of opposite charged ions
Atoms sharing electrons
Between opposite poles of polar molecules