Identify the specific element that corresponds to each of the following electron configurations.?

Question

Identify the specific element that corresponds to each of the following electron configurations.
(a) [He]2s22p1

(b) [Ne]3s23p5

(c) [Kr] 5s1

(d) [Xe]6s1

Answer 1

a) [He]2s22p1 = B

(b) [Ne]3s23p5 = Cl

(c) [Kr] 5s1 = Rb

(d) [Xe]6s1 = Cs

Look at your periodic table it will become clear
group I s1
group II s2
group III s2p1
----------------------
then IIIb to IIb occupies d
and between IIIb and IVb f
---------------------
group IV s2p2
group V s2p3
group VI s2p4
group VIIs2p5
group VIIIs2p6

Answer 2

a). Lithium (Li)
b). Chlorine (Cl)
c). Rubidium (Rb)
d). Caesium (Cs).