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Atoms and elements
Terms in this set (11)
Building blocks of matter
Evidence that does not involve direct observation
A region that is located at the center of an atom and contains most of the atom's mass
A subatomic particle that has a negative charge
A subatomic particle that has a positive charge and that is found in the nucleus of an atom
A pure substance made of only one kind of atom
Number of protons in an atom.
the sum of the number of neutrons and protons in an atomic nucleus
Atoms of the same element that have different numbers of neutrons
Different molecular forms of the same element.
A simplified description designed to show the structure or workings of an object, system or concept.
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