D should be the answer since there are tons of moons in our solor systtem
Answer:
Alkali metals are highly reactive elements that appear to be silver and they are found in group 1 of the periodic table. It consists of lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). As you go further down the group, the more reactive they are. Those elements all react to water and air, so they must be kept in oil to preserve their state.
The sub-atomic particles inside the nucleus of atoms of any element are protons and neutrons. Protons have a positive charge and neutrons are neutral with no charge.
