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ch.11 vocab

vocab

TermDefinition
atom the smallest unit of an element that maintains the properties of that element
electron a subatomic particle that has a negative charge
nucleus in physical science, an atoms central region, which is made up of protons and neutrons
electron cloud a region around the nucleus of a atom where electrons are likely to be found
proton a subatomic particle that has a positive charge and that is found in the nucleus of a atom
atomic mass unit a unit of mass that describes the mass of an atom or molecule
neutron a subatomic particle that has no charge and that is found in the nucleus of an atom
atomic number the number of protons in the nucleus of an atom; the atomic number is the same for all atoms
isotopes an atom that has the same number of protons as the other atoms of the same element does, but that has a different number of neutrons
mass number the sum of the numbers of protons and neutrons in the nucleus of an atom
atomic mass the mass of an atom expressed in atomic mass units
Created by: amber12806
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