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Number of electron having l+m value equ...

Number of electron having `l+m` value equal to zero in `._(26)Fe` may be

A

13

B

20

C

7

D

12

Text Solution

Verified by Experts

The correct Answer is:
1
`._(26)Fe-1s^(2),2s^(2)2p^(6),3s^(2)3p^(6),3d^(6),4s^(2)`
`l+m=0" "rArr" "l=0,m=0" "i.e" "s-`subshell
`l=1,m=-1" "i.e." "` one orbital of `p.`
`l=2,m=2" "i.e." "` one of `d-` orbitals
hence there are 12 or 14 electron as in `d-` orbital it may be one or two electron having `m=-2`
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Number of electrons having l+m=0 in Mn(z=25) is

Knowledge Check

  • Number of electrons having l+m value equal to zero in ._(25)Mn may be

    A
    13
    B
    14
    C
    7
    D
    12

  • The number of electrons in Na, having n+l =3

    A
    4
    B
    6
    C
    7
    D
    8

  • Which of the following has // have value equal to zero ?

    A
    `|{:(8,,2,,7),(12,,3,,5),(16,,4,,3):}|`
    B
    `|{:(1//a,,a^(2),,bc),(1//b,,b^(2),,ac),(1//c,,c^(2),,ab):}|`
    C
    `|{:(a+b,,2a+b,,3a+b),(2a+b,,3a+b,,4a+b),(4a+b,,5a+b,,6a+b):}|`
    D
    `|{:(2,,43,,6),(7,,35,,4),(3,,17,,2):}|`

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