1.

If the electronic configuration of an element is 1s^(2)2s^(2)2p^(6)3p^(6)3d^(2)4s^(2), the four electrons involved in chemical bond formation will be :

Answer»

`3p^(6)`
`3p^(6),4S^(2)`
`3p^(6),3D^(2)`
`3d^(2),4s^(2)`

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