A covalent bond forms when
(1)two nuclei share electrons in order to achieve a complete octet of electrons
(2) atoms form ions and then electrostatic forces of attraction bond the ions together.
(3)repulsive forces between atoms are greater than the attractive forces
(4) a metal atom combines with a nonmetal atom
please help !

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  1. Actually, none of the choices is correct. I think, however, it was intended for #1 to be the answer. That statement is true for elements except for the H2 molecules(share two electrons) and a few others like NO2.

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