Potassium (K) can be found on the periodic table in the fourth period and first group, with an atomic number of 19. To find the number of neutrons, we subtract the atomic number (which represents the number of protons) from the atomic mass number.
The atomic mass of potassium is approximately 39.10. Since the atomic number of potassium is 19, we have:
Number of neutrons = Atomic mass number - Atomic number
= 39.10 - 19
= 20.10
Therefore, potassium has approximately 20 neutrons.
Find potassium on the periodic table. How many neutrons does potassium have? Show how you calculated this number.
1 answer