Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Classification of Elements and Periodicity in Properties
The correct order of atomic size of C, N, P, S follows the order -
1
N < C < S < P
2
N < C < P < S
3
C < N < S < p
4
More than one of the above
5
None of the above