In the formula XF2, the element represented by X can be classified as a Group 1 metal Group 2 metal Group 1 nonmetal Group 2 nonmetal

XF2 has a net charge of 0. F has 7 valence electrons, so when F forms an ionic bond, it gains 1 more electron to complete its octet, giving F a charge of - 1. Two fluorines in one compound makes a charge of - 2. To get a net charge of 0, X must have a charge of + 2 in XF2. Elements that form a charge of + 2 in ionic compounds include group 2 metals.