HELP ASAP How is an atom of the metal calcium, which is in group 2 and period 4, most likely to attain a full outermost energy level of electrons?
1.The atom will share two electrons with another atom to form a covalent bond.
2.The atom will steal two electrons from another atom to become a +2 ion.
3.The atom will steal six electrons from other atoms to have a total of eight electrons in its outermost energy level.
4.The atom will allow its two outermost energy level electrons to be stripped away, resulting in a cation with a charge of +2.