State the following.

1. The group to which the element with electronic configuration of 2, 8, 2 belongs.
2. The group from the groups 1[IA], 2[IIA], 16[VIA] and 17[VIIA] whose elements are most electronegative.
3. The group which contains highly electropositive metals including sodium.
4. The group whose elements are unreactive or inert.
5. The group which contains highly reactive electronegative non-metals including chlorine.

1. Group 2 [ or Group II-A]
2. Group 17 [ or Group VII-A]
3. Group 1 [ or Group I-A]
4. Group 18 [ or Group 0]
5. Group 17 [ or Group VII-A]