Answer:
Number of Protons:
Co: 27
Cl: 17
K: 19
S: 16
Al: 13
P: 15
Number of Electrons:
Co: 25
Cl: 18
K: 18
S: 18
Al: 10
P: 18
your answer would be C hope this helps
ΔH = 57 Kj/mole H₂O
Explanation: