higdon science chpt 9 vocab

Question Answer
smallest piece of an element that still represents that element atom
particle with one negative charge electron
most of an atoms mass and positive charge is concentrated in a small area in the center of the atom nucleus
an atomic particle that has one positive charge proton
neutral particle that exists in the nucleus of an atom neutron
area around an atomic nucleus were n electron is most likely to be located electron cloud
number of protons in an atom of an element atomic number
atoms of the same elements that have different numbers of neutrons isotopes
sum of the number of protons and neutrons in an atom mass number
atom that is no longer neutral bc it has gained or lost neutrons ion

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