How many neutrons are in the nucleus of potassium ⁴⁰K? A)20 B)21 C)22 D)40

Question

Quizplus · Accepted Answer

Potassium (K) has an atomic number of 19, which means it has 19 protons. The notation ⁴⁰K seems to be a distraction or a formatting error. The number of neutrons in an isotope is found by subtracting the atomic number from the mass number. If we assume the mass number is 40 (as might be implied by the "D" option), then the number of neutrons is 40 - 19 = 21.

How Many Neutrons Are in the Nucleus of Potassium 40K

How Many Neutrons Are in the Nucleus of Potassium ⁴⁰K