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Number of electrons with -1/2 spin in n=...

Number of electrons with -1/2 spin in n=4 is

A

32

B

16

C

8

D

9

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The correct Answer is:
B
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In an atom the number of electrons in M - shell is equal to the number of electrons in the K and L - shell . Answer the question. Explanation : 1) Number of electrons in K-shell (1 s^(2)) = 2 Number of electrons in L-shell (2s^(2) sp^(6)) = 8 Total number of electrons in k & L shells = 10 2) Given that number of electrons in M-shell is equal to number of electrons in K& L- shells 3) Hence number of electrons in M-shell (3s^(2) 3p^(6) 3d^(2)) = 10 4) But , we know that before filling of 3d orbital 4s should be filled (4s^(2)) 5) So , electronic configuration is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(2) What is the atomic number of element ?

In an atom the number of electrons in M - shell is equal to the number of electrons in the K and L - shell . Answer the question. Explanation : 1) Number of electrons in K-shell (1 s^(2)) = 2 Number of electrons in L-shell (2s^(2) sp^(6)) = 8 Total number of electrons in k & L shells = 10 2) Given that number of electrons in M-shell is equal to number of electrons in K& L- shells 3) Hence number of electrons in M-shell (3s^(2) 3p^(6) 3d^(2)) = 10 4) But , we know that before filling of 3d orbital 4s should be filled (4s^(2)) 5) So , electronic configuration is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2) 3d^(2) Which is the outermost cell ?

The total number of electrons that take part in forming the bonds in N_2 is

The maximum number of electrons that can have principal quantum number, n = 3 and spin quantum number m_s= - 1//2 is ________.

(A) The calculated spin only magnetic moment of Ti^(+2) is 1.73 BM. (R) Number of unpaired electrons in Ti^(+2) is 4.

The maximum number of electrons that can have the set of quantum numbers, n=4, m_(l)=0 and m_(s)=1/2 is

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AAKASH SERIES-ATOMIC STRUCTURE-Objective exercise - 2B
  1. The values of four quantum numbers of valence electron of an element a...

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  2. Number of electrons with +1/2 spin in n=3 is

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  3. Number of electrons with -1/2 spin in n=4 is

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  4. For which one of the following sets of quantum numbers an electron wil...

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  5. Which of the following sets of quantum numbers represents the highest ...

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  6. Which of the following elements has least number of electrons in its "...

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  7. The atomic number (Z) of an element is 25. In its ground state, how ma...

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  8. The following species has the lowest number of electrons in the valenc...

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  9. The number of unpaired electrons present in the first excited state of...

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  10. The number of electrons in M-shell of an element with atomic number 24...

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  11. The atomic number of an element is 35. what is the total number of ele...

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  12. If the atomic number of an element is 36, the number of electrons pres...

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  13. The number of unpaired electrons present in palladium (Z=46) atom is

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  14. Which of the following has maximum number of unpaired electrons (atomi...

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  15. Which one of the following has more number of unpaired d-electrons ?

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  16. Which of the following statements is relation to the hydrogen atom is ...

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  17. Which of the following pair of atoms/atom, ions having identical groun...

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  18. The number of d-electrons in Fe^(2+) ion is

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  19. Which one of the following ions has same number of unpared electrons a...

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  20. Fe is converted to Fe^(2+), the decreases in the number of electrons w...

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