Examlex
Imagine two related species that have non-overlapping ranges.If the following events involving these two species were arranged in the order they likely occurred,which event would be third?
Atomic Number
Number of protons in each type of atom.
Mass Number
Number of protons plus the number of neutrons in each atom.
Neutrons
Subatomic particles found in the nucleus of an atom that have no electric charge.
Mass Number
The total number of protons and neutrons in an atom's nucleus, indicating the mass of the atom.
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