Consider the elements Cs, Ne, I and F.
a) Identify the element that exhibits only negative oxidation state.
b) Identify the element that exhibits only positive oxidation state.
c) Identify the element that exhibit both positive and negative oxidation states
d) Identify the element which neither exhibit the negative nor does the positive oxidation state.

Explanation

Ne. doesnot exhibit any oxidation state in ground state (Neither positive nor negative)