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The strength of the gravitational forces between two masses depends on
-- the product of the masses,
-- the distance between their centers of mass.
<span>The valence electrons occur in the outer shell of the atom. </span>
Answer:
The main types of nucleons are protons and neutrons. A proton, as its name suggests, has a positive electric charge, and a neutron has a neutral electric charge (meaning that it has no charge). The two in the nucleus of the atom make a positive charge, since the neutron has no charge at all.
Explanation:
