Question

atom ion isotope - a potassium atom has equal numbers of protons and electrons and one more neutron than protons - a potassium ion has one less electron than protons giving it a negative charge - an isotope of potassium has two more neutrons than protons giving it a greater atomic mass than the potassium atom

Explanation:

1. A neutral atom has equal protons and electrons. A potassium atom has 19 protons and 19 electrons, and 20 neutrons (1 more than protons).
2. A potassium ion has a positive charge as it loses 1 electron (1 less electron than protons), not negative.
3. Isotopes have different neutron - numbers. An isotope with 22 neutrons (2 more than protons) has greater atomic mass.

Answer:

The statement "a potassium ion has one less electron than protons giving it a negative charge" is incorrect. A potassium ion has a positive charge.