Question

Match the valence shell relectron configurations below with the BEST description of a family of elements:



Column A
1.
3S2 3P2:
3S2 3P2
2.
2S2:
2S2
3.
4S1:
4S1
4.
6S2 5d1 4f8:
6S2 5d1 4f8
5.
3S2 3P6:
3S2 3P6
Column B
a.Alkaline earth metal
b.alkali metals
c.has a full set of valence electrons/ noble gas
d.Representative element in p-block
e.inner transition element

Answer 1

1 → d
2 → a
3 → b
4 → e
5 → c

Brief reasons:
1. 3s2 3p2 = p-block representative (group 14, e.g., Si).
2. 2s2 = filled s in period 2 (Be, an alkaline earth).
3. 4s1 = alkali metal valence (K).
4. 6s2 5d1 4f8 = contains 4f electrons → inner transition (lanthanide/actinide).
5. 3s2 3p6 = full valence shell (noble gas, Ar).