Question

the symbol p represents the element phorphorus. this elements atomic number is 15. how many protrons and electrons are in a p-3 ion?

Answer 1

Answer: C. 15 protons and 18 electrons.

Step-by-step explanation:

Answer 2

Phosphorus is element number 15, so the P atom has 15 protons and 15 electrons
for a total of +15 + -15 = 0 charge

P-3 has a charge of -3 because it has attracted 3 electrons off a less electronegative atom.

Now, the P atom has 15 protons (+15) and 18 electrons (-18) which = -3 net charge on the P-3 ion.