Answer
See explanation
Work Step by Step
a. 1s² 2s² 2p⁶ 3s² 3p²
Total electrons:
2+2+6+2+2=14
Atomic number: 14
Element: Silicon (Si)
b. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹
Total electrons:
2+2+6+2+6+2+1=21
Atomic number: 21
Element: Scandium (Sc)
c. [Ar] 4s² 3d¹⁰
[Ar] represents 18 electrons
Additional:
2+10=12
Total electrons: 18+12=30
Atomic number: 30
Element: Zinc (Zn)
