/** * https://gist.github.com/samthor/64b114e4a4f539915a95b91ffd340acc */ (function() { var check = document.createElement('script'); if (!('noModule' in check) && 'onbeforeload' in check) { var = false; document.addEventListener('beforeload', function(e) { if (e.target === check) { = true; } else if (!e.target.hasAttribute('nomodule') || !) { return; } e.preventDefault(); }, true); check.type = 'module'; check.src = '.'; document.head.appendChild(check); check.remove(); } }());

Explaining chemistry : Video playlist

Part of Chemistry (Single Science)Explaining chemistry

How do we calculate mass and atomic numbers?

Description

This video is an interactive lesson in calculating an atom’s mass and atomic number. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of particles in an atom can be calculated from its atomic number and mass number.

Find out more about GCSE Chemistry

Explaining chemistry

Now playing video 1 of 8