Saloni Rakholiya
Last Activity: 10 Years ago
atomic number is the number of protons (or neutrons) in an element . eg- atomic number of oxygen is 8 and that of lithium is 3. atomic mass is the number of protons +the number of neutrons .it is approx. double the atomic number .eg- atomic mass of oxygen is 16 and carbon is 12. hope this helps you.......