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Subshell elctronic configuration of an e...

Subshell elctronic configuration of an element 'X' is given. `1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2`
a. Findout the block in which x is included?
b) Represent the subshell electronic configuration in 'x' by using the symbol of noble gas preceding it.

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a. d block
`b. [Ar] 3d^3 4s^2`
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