Question

electron configuration assignment
what element is represented by the electron configuration below?
1s² 2s² 2p⁶ 3s² 3p¹
silicon
aluminum
carbon

Explanation:

Step1: Count total electrons

Add up the exponents: $2 + 2+6 + 2+1=13$.

Step2: Identify element

The atomic number of an element is equal to the number of electrons in a neutral atom. Aluminum has an atomic number of 13.

Answer:

B. aluminum