Question

An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this element

Answer 1

atomic \(mass\), usually abbreviated \(A\), is always equal to the sum of the protons and neutrons in the nucleus of a particular atom.

atomic \(number\), usually abbreviated \(Z\), is always equal to the \(number\) of protons in the nucleus.