Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Basic Concepts of Chemistry
Which electronic configuration indicates a cation ?
1
17p, 17e, 18n
2
2e, 3p, 4n
3
19e, 20n, 17p
4
More than one of the above
5
None of the above