Question

Among Mn, Tc, Re, and Bh, which are having the (n-1)d$^5$ ns$^2$ electronic configuration?

• A. Mn, Tc only
• B. Mn, Re, Bh only
• C. Mn, Tc, Re, Bh
• D. Mn, Re only

Hint:

When studying transition metals, refer to their electron configurations to identify trends like the \( (n-1)d^5 ns^2 \) configuration.

Answer 1

The Correct Option is B

The electronic configuration of elements such as Mn (Manganese), Re (Rhenium), and Bh (Bohrium) follows the pattern \((n-1)d^5 ns^2\). These elements exhibit a particular type of electron arrangement, which can be confirmed by referring to the periodic table. Technetium (Tc) does not follow this configuration.
Thus, the correct answer is that Mn, Re, and Bh are the elements with the \( (n-1)d^5 ns^2 \) configuration.