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The first period (n = 1) starts with the...

The first period `(n = 1)` starts with the filling of___________subshell.

A

`1s`

B

`1p`

C

`1d`

D

`1f`

Text Solution

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The correct Answer is:
A
It starts with the filling of the lowest enegry subshell i.e., `1s`.
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R SHARMA-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN ELEMENTS-Follow-up Test
  1. What would be the IUPAC name and symbol for the element with atomic nu...

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  2. Total number of element in each period is twice the number ofbeing fil...

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  3. The first period (n = 1) starts with the filling ofsubshell.

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  4. The second period (n = 2) involves the filling up to electron inatomic...

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  5. The third period (n = 3) involves the filling up to electrons inelemen...

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  6. The fourth period (n = 4) does not involve the filling up of electrons...

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  7. The fifth period (n = 5) beginning with rubidium is similar to the fou...

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  8. The sixth period (n = 6) of the periodic table contains 32 elements an...

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  9. Which of the following lanthanoids does not contain 5d electron in its...

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  10. Which of the following actinoids contains 6d^(2) electrons its valence...

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  11. Which of the following groups of periodic table contains maximum numbe...

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  12. In s-block elements, the differentiating electron enters the orbital.

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  13. On the basis of chemical behavior, how many element belong to the s-bl...

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  14. A1though the elements in the periodic table are arranged according to ...

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  15. Which of the following elements is placed on its own in the table to i...

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  16. In p-block elements, theorbitals are successively filled.

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  17. The general valence shell electronic configuration of p-block elements...

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  18. How many elements belong to the p-block of the periodic table on the b...

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  19. For many years, the group 18(VIIIA) elements were called intert gases ...

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  20. p-block elements mostly fromcompounds.

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