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Number of unpaired electrons in the grou...

Number of unpaired electrons in the ground state of beryllium atom is

A

2

B

1

C

0

D

All of above

Text Solution

Verified by Experts

The correct Answer is:
C
`Be_4=1s^2 , 2s^2` =(Ground state)
Number of unpaired electrons in the ground state of Beryllium atom is zero
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ERRORLESS -ATOMIC STRUCTURE-Quantum numbers , Electronic configuration and Shape of orbitals
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  2. Ions which have the same electronic configuration are those of

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  3. The shape of s-orbital is

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  4. Which of the following sets of orbitals may be degenerate

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  5. The set of quantum numbers n=3, l=0, m=0, s=-1/2 belongs to the elemen...

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  6. Which of the following has the least energy

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  7. Number of unpaired electrons in the ground state of beryllium atom is

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  8. Doubly magic nucleus is …

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  9. Values of the four quantum numbers for the last electron in the atom a...

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  10. Which of the following is not correct for electron distribution in the...

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  11. The total number of electrons present in all s orbitals, all the p orb...

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  12. Which of the following pair of orbitals possess two nodal planes

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  13. Assertion : The energy of an electron is mainly determined by principa...

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  14. Statement-I : No two electrons in an atom can have the same values of ...

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  15. (A) 3d(z^(2)) orbital is spherically symmetrical. (R) 3d(z^(2)) orbi...

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  16. Satement-1: Spin quantum number can have two values +1/2 and -1/2. ...

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  17. Assertion: Total number of orbitals associated with principal quantum ...

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  18. Assertion: Atomic orbital in an atom is designated by n,l,m1 and ms ...

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  19. Assertion: Energy of the orbitals increases as 1s lt 2s = 2p lt 3s = 3...

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  20. Which one is a wrong statement ?

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