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Atomic number of an element of 43. The c...

Atomic number of an element of 43. The correct set of it's period number , block and group number is `:`

A

`{:(,"Period no.",,"Block",,"Group no."),((1),5,,d,,5):}`

B

`{:(,"Period no.",,"Block",,"Group no."),((2),4,,d,,7):}`

C

`{:(,"Period no.",,"Block",,"Group no."),((3),5,,d,,7):}`

D

`{:(,"Period no.",,"Block",,"Group no."),((4),5,,s,,7):}`

Text Solution

Verified by Experts

The correct Answer is:
3
Period no. `=` Last orbit no.` " , "` Block `=` Subshell in which last electron enters
Gr. No. of `d-` block elements `=(n-1)d+`ns electrons.
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  • The number of elements present in the d-block of the periodic table is

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