Oxygen-18 is a naturally-occuring, stable isotope and is commonly used is scientific studies as a tracer. Using the periodic table, predict the number of electrons, neutrons, and protons in oxygen-18.

1. Proton number = 8

2. Electron number = 8

3. Neutron = 10

Explanation:

Mass number = 18

Proton = 8 (isotope still retain their atomic number)

Electron = proton = 8 (since it is a neutral atom)

Neutron number = ?

Neutron = Mass number - proton

Neutron number = 18 - 8 = 10