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The atomic number of chromium is 24 Its ...

The atomic number of chromium is `24` Its electronic coefigueration in ground state in `1s^(2) 2s^(2)2p^(6)3s^(2)4s^(1) 3d^(5)` .Chromium atom by using `3` electron from `Cr ^(2+)` .A chromium atom contain `17%` morte neutron than the proton. Now answer the following questions
The number of unopaired electron in `Cr ^(2+)`ion is

A

3

B

6

C

5

D

1

Text Solution

Verified by Experts

The correct Answer is:
A
`Cr^(3+),1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(3)`.Three electrons in `3d` sub-shell are unpaired
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Knowledge Check

  • The atomic number of chromium is 24 Its electronic coefigueration in ground state in 1s^(2) 2s^(2)2p^(6)3s^(2)4s^(1) 3d^(5) .Chromium atom by using 3 electron from Cr ^(2+) .A chromium atom contain 17% morte neutron than the proton. Now answer the following questions The number of occupied sub- shell in Cr^(3+) ion is

    A
    3
    B
    4
    C
    5
    D
    6

  • The atomic number of chromium is 24 Its electronic coefigueration in ground state in 1s^(2) 2s^(2)2p^(6)3s^(2)4s^(1) 3d^(5) .Chromium atom by using 3 electron from Cr ^(2+) .A chromium atom contain 17% morte neutron than the proton. Now answer the following questions The electron atom can be respresentted by the symbol

    A
    `._(24)Cr^(50)`
    B
    `._(24)Cr^(32)`
    C
    `._(32)Cr^(24)`
    D
    `._(50)Cr^(24)`

  • The atomic number of chromium is 24 Its electronic coefigueration in ground state in 1s^(2) 2s^(2)2p^(6)3s^(2)4s^(1) 3d^(5) .Chromium atom by using 3 electron from Cr ^(2+) .A chromium atom contain 17% morte neutron than the proton. Now answer the following questions The number of electron having n = 3 and m_(1) = 0 in chromium atom is

    A
    2
    B
    5
    C
    4
    D
    1

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