Question

The electronic configuration of transition element "X", is $+3$, oxidation state is $[Ar]3d^5$. What is its atomic number ?

• A. 25
• B. 26
• C. 27
• D. 24

Answer 1

Answer: (B)

$X^{+3}$

$[Ar]3d^5$ : No of electrons $=18+5=23$ + oxidation state

$=23+3=26=z$