Question

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

• A. $6\text{and}3$
• B. $5\text{and}3$
• C. $6\text{and}4$
• D. $5\text{and}4$

Answer 1

The correct option is C

$6\text{and}4$

Explanation for correct option

(C)$6\text{and}4$

Group number of the chromium

• The atomic number of chromium is $24$.
• The electronic configuration of chromium is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^5$.
• Outermost orbit is $4s$.
• So, the period of the element is $4$.
• The nearest noble gas is $\mathrm{Ar}\left(18\right)$.
• The Group of chromium is $24–18=6$
• 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 $6\text{and}4$. 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 $6\text{and}4$.