Question

what is the mass number of an atom of potassium that has 20 neurons?

what is the mass number of an atom of potassium that has 20 neurons?

Homework Answers

Answer #1

For potassium, the atomic number,Z = 19

We know that Atomic number= no.of protons = 19

Given number of neutrons is 20

Atomic mass number= no. of protons + no. of neutrons

                               = 19 + 20

                               = 39

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