Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Basic Concepts of Chemistry
Which group of atoms has nearly the same atomic radius?
1
Na, K, Rb, Cs
2
Li, Be, B, C
3
Fe, Co, Ni
4
More than one of the above
5
None of the above