Question

I have 2 questions:
1: Which is the odd one out lithium sodium potassium or iron (and give a reason)
2: Which is the odd one out chlorine bromine oxygen or iodine (and give a reason)

Answer 1

Answer:

Carbon is the odd one out because carbon has 4 valence electrons and belong to 4

th

group whereas all others have 1 valence electrons and is in 1

st

group