Question

which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵? select the correct answer below: o fe o ni o tc o mn

Explanation:

Step1: Calculate total electrons

Add up the exponents in the electron - configuration. $2 + 2+6 + 2+6 + 2+5=25$.

Step2: Identify element by atomic number

The atomic number of an element is equal to the number of electrons in a neutral atom. The element with atomic number 25 is Manganese (Mn).

Answer:

Mn