What is the mass number of an atom of potassium that has 18 neutrons?
1 Answer
Jul 7, 2016
Mass Number of Potassium = 37amu.
Explanation:
The mass number of an element is determined by adding the number of protons and neutrons in the atom.
Potassium is atomic number 19 on the periodic table.
The atomic number is equal to the number of protons.
Atomic number 19 = 19 protons.
We are told in the question 18 neutrons
Mass number = Protons + Neutrons
Mass number
Mass Number of Potassium = 37amu.
