Respuesta :
Answer:
7 elements
Explanation:
P - Phosphorus
Ba - Barium
S - Sulfur
K - Potassium
O - Oxygen
C - Carbon
I - Iodine
Either 6 or 7. Capital letters represent a new element. So at the end, when it either says Cl - chlorine or CI carbon and iodine, it just depends on if that’s a CAPITAL I or lowercase l