SSC CSIR ASO/SO Mock Test 2023 General Science Chemistry Classification of Elements and Periodicity in Properties
Which one of the following is the correct order of the valencies of elements Ar, Si, N and Mg?
1
Ar < Mg < N < Si
2
Si < N < Mg < Ar
3
Ar < N < Si < Mg
4
Mg < Ar < N < Si