Examlex
Charles Darwin is the only person who came up with the idea that organisms change over time and are descended from a common ancestor.
Positively Charged
Having more protons than electrons, resulting in a net positive electric charge.
Negatively Charged
Refers to atoms or molecules that have gained one or more electrons, resulting in a net negative charge.
Molecule
The smallest physical unit of an element or compound, consisting of one or more atoms held together by chemical forces.
Ion
A molecule or atom that has acquired an overall electric charge from either losing or gaining electrons.
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