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It each orbital can hold a maximum of th...

It each orbital can hold a maximum of three electrons, the number of elements in 9th period of periodic table (long form) are:

A

48

B

162

C

50

D

75

Text Solution

Verified by Experts

The correct Answer is:
D
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ALLEN-QUANTUM NUMBER & PERIODIC TABLE-EXERCISE
  1. The statement that is not correct for the periodic classification of e...

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  2. Among the following which species is/are paramagnetic (i) Sr^(2+) ...

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  3. It each orbital can hold a maximum of three electrons, the number of e...

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  4. Which of the following clement has highest metallic character

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  5. The electronic configuration of an clement is 1s^(2), 2s^(2), 2p^(6), ...

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  6. the number of d- electrons in Mn^(2+) is equal to that of :

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  7. Which of the following is correct order of EA.

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  8. Select the correct statement(s).

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  9. Which of the following are correct

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  10. If Aufbau's principle and Hund's rule were not followed.

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  11. In halogen, which of the following properties increase from iodine to ...

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  12. ln which of the following sets of elements 1^(st) element is more meta...

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  13. Amongst the following statements, which is/are correct?

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  14. Select the correct statements (s)

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  15. Statement-1 : The groundstate configuration of Cr is [Ar] 3d^(5) 4s^(1...

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  16. Assertion: The first ionisation energy of Be is greater than that of B...

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  17. Statement-1 : IE(1) ofN is greater than 0 . Statement-2: N-atom is b...

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  18. Statement-1 : First electron gain enthalpy is alway -ve for an element...

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  19. Statement-1: Ionization potential of Sn is less than Pb. Statement-2...

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  20. Statement-1 : Electron gain enthalpy of Cl is largest in periodic tabl...

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