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)

26

Answer 2

$X^{+3}$ $[Ar]3d^{5}$ : No of electrons $= 18 + 5 = 23$ + oxidation state $= 23 + 3 = 26 = z$