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Question

The group number and period of the chromium in the periodic table are, respectively:


A

6and3

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B

5and3

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C

6and4

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D

5and4

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Solution

The correct option is C

6and4


Explanation for correct option

(C)6and4

Group number of the chromium

  • The atomic number of chromium is 24.
  • The electronic configuration of chromium is 1s22s22p63s23p64s13d5.
  • Outermost orbit is 4s.
  • So, the period of the element is 4.
  • The nearest noble gas is Ar18.
  • The Group of chromium is 2418=6
  • Hence, the period of chromium is 4, and the group is 6.

Explanation for incorrect option

The group number and period of the chromium in the periodic table are 6and4. Hence, options (A), (B), and (D) are incorrect.

Hence, option (C) is correct. The group number and period of the chromium in the periodic table are 6and4.


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