A particle in the space inside the nucleus that carries one unit of positive electric charge.

A particle in the space outside the nucleus of an atom that carries one unit of negative charge.

The number of protons in a single atom of protons in a single atom of an element.

A particle that contains two or more atoms joined together.

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Science

Term	Definition
proton	A particle in the space inside the nucleus that carries one unit of positive electric charge.
neutron
electron	A particle in the space outside the nucleus of an atom that carries one unit of negative charge.
atomic number	The number of protons in a single atom of protons in a single atom of an element.
molecule	A particle that contains two or more atoms joined together.
metals
nonmetal
noble gases
metalloids
periodic table