Question

atom has 7 valence electrons and another atom has 2 valence electrons type of bond

Answer 1

covalent bond.. because there will be mutual sharing of electrons

Answer 2

1.The electrons present in the outermost shell of an atom are called valence electrons. 2.Exceptions to the octet rule include hydrogen (H) and helium (He) that follow the duet rule instead.  3.They are the first two elements of the periodic table and have a single electron shell which accommodates only 2 electrons.