Question

1. which element has the following electron configuration? 1s2 2s2 2p6 3s2 3p6 4s2 3d10?

options: germanium (ge), calcium (ca), krypton (kr), zinc (zn)

Explanation:

Step1: Calculate total electrons

Sum the exponents: \(2 + 2 + 6 + 2 + 6 + 2 + 10 = 30\).

Step2: Identify element by atomic number

Atomic number = number of electrons = 30. Zinc (Zn) has atomic number 30.

Answer:

D. Zinc (Zn)