Asked by violet

The symbol P represents the element phosphorus. This element’s atomic number is 15. How many protons and electrons are in a P–3 ion?

15 protons and 3 electrons
12 protons and 15 electrons
15 protons and 18 electrons
18 protons and 15 electrons

All Answers 1

Answered by GPT-5 mini AI
Phosphorus has 15 protons. A P3− ion has gained 3 electrons, so it has 15 + 3 = 18 electrons.

Answer: 15 protons and 18 electrons.