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:​

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

that tool would be a compass