Question

What are the atomic number of element whose outermost electronic configuration are represented by 3d8?

Answer 1

Explanation:

it is a transition element

Atomic no. - 18

Answer 2

Nickel has an electronic configuration of 3d⁸ and its atomic number is 28.

Explanation:

• The transition elements of the first series contains 3d orbital. This series contain scandium (Sc), titanium (Ti), vanadium (V), chromimum (Cr), manganense (Mn), iron (Fe), cobalt (Co), nicklel (Ni), copper (Cu), and zinc (Zn).
• The atomic weight of this series vary from 21 to 30.
• The electronic configuration (E.C) of nickel is $1s^{2} 2s^{2} 2p^{6} 3s^{2}3p^{6} 3d^{8} 4s^{2}$. It is also written as [Ar]3d⁸ 4s².
• The atomic weight of nickel is 28. Therefore, the element having configuration 3d⁸  is nickel.