Question

Correct orders of $1^{st}$ I.P. are
(1) LI <B < Be < C
(2) O <N < F
(3) Be <N <Ne

• A. $1,2$
• B. $2,3$
• C. $1,3$
• D. $1,2,3$

Answer 1

The correct option is C $1,3$

$I.P.=Li<B<Be<C,O<N<F,$

$I.P.=Be<N<Ne.$

since$,$ Nobel gas completely filled configuration it has maximum $IE$ than partially filled$.$

And in period from left to right $IE$ increases$.$