railway RRB Group D Mock Test Series 2024-25 General Science Chemistry Structure of Atom

If the electronic configuration of element A’ and B’ are 1s2, 2s22p6, 3s1 and 1s2,2s22p6,3s2, 3p4 respectively, then the formula of the compound formed by the combination of these elements will be:

1
AB3
2
A2B
3
AB
4
AB2
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