Problem: Write the full ground-state electron configuration for each element.(a) S: (b) Kr: (c) Cs:

•In a neutral atom:

Atomic number = # of protons = # of electrons

• Distribute electrons in the atomic orbitals:

Recall:

s orbital → can hold a maximum of 2 electrons
p orbitals → can hold maximum of 6 electrons
d orbitals → can hold maximum of 10 electrons
f orbitals → can hold maximum of 14 electrons

(a) S: 

S: atomic number = 16 → 16 protons & 16 electrons