6.4 The two outer levels of a few elements electron configuration are as follows: Element A: s2p6 s2
Element B: s2p6 s2p3
Element C: s2pd 10 s2p6
Element D: s2p6 s2pl
Element E: s2p6 sl
Element F: s2p6 d10f14 s2p5
3.5 To which group do each of these elements belong?
A:
B:
C:
E:
F:​