Asked by mema

What is the mass number of an atom of potassium that has 20 neutrons?

Answers

Answered by DrBob222
mass # = # protons + # neutrons.
Atomic number = # protons.
Answered by Anonymous
39
Answered by Paula Lyn
What is the charge of potassium atom if you substract the number of electrons and the number of protons?
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