If you're seeing this message, it means we're having trouble loading external resources on our website.

Hvis du er bak et webfilter, vær vennlig å sørge for at domenene .kastatic.org og .kastatic.org ikke er blokkert.

Hovedinnhold

Emne: Atoms, compounds, and ions

Om dette emnet

Chemistry is the study of matter, and all matter is made up of atoms. We will learn about elements, atomic number and mass, isotopes, moles (chemistry moles, not the animal), and compounds.