Determine the number of protons and number of neutrons in the nucleus of each the following.

Question

Strontium - 88

rubidium-84

merury-200

Answer 1

The element is defined by the number of protons, so just look up the element and use the atomic number as the number of protons. Subtract the number of protons from the atomic mass to obtain the number of neutrons.

Strontium - 88 has 38 protons and 50 neutrons

rubidium-84 has 37 protons and 47 neutrons

mercury-200 has 80 protons and 120 neutrons