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s8p1.a

distinguish between atoms and molecules

TermDefinition
atom- the smallest unit of an element that maintains the properties of that element
element- a substance that cannot be separated or broken down into simpler substances by chemical means
nucleus- in physical science, an atoms central region, which is made up of protons and neutrons
proton- a subatomic particle that has a positive charge and that is found in the nucleus of an atom.
neutron- a subatomic particle that has no charge and that is found in the nucleus of an atom.
electron- a subatomic particle that has a negative charge
atomic number- the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element.
neutral- having no overall charge
atomic mass- the mass of an atom expressed in atomic mass units
chemical symbol- a one or two letter code that represents an element
Created by: 78chaker
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