Question

a potassium atom is converted to a potassium ion when the atom
○ gains one electron.
○ gains two electrons.
○ loses one electron.
○ loses two electrons.

Explanation:

Potassium is in Group 1 of the periodic table. It has 1 valence - electron. To achieve a stable electron configuration (noble - gas configuration), it loses this 1 valence - electron to form a positively charged ion.

Answer:

C. loses one electron.