Question

Electronic configuration of some elements are given below.
[Symbols are not real]
A-> 1s2 2s2 2p6 3s2 3p6
B-> 1s2 2s2 2p6 3s1
C-> 1s2 2s2 2p6 3s2 3p6 3d1 4s2
D-> 1s2 2s2 2ps
E-> 1s2 2s2 2p6 3s2
a) which elements belong in second group?
b) which element gives coloured compound?
c) Which one is alkali metal?
d) Which one belong in inert gas/noble gas?​

Answer 1

Answer:

element E belongs to second group

element c gives coloured compound

element B is alkali metal

element A is noble/ inert gas