1.

Element with atomic number belongs to the period.........and the group ........

Answer»

`4^(TH),12^(th)`
`4^(th),11^(th)`
`5^(th),12^(th)`
`5^(th),11^(th)`

SOLUTION :Electronic configuration : `[KR]4D^(10)5s^(1)`, period `=5^(th)`, group `=10+1=11^(th)`


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