Atoms and Molecules

Elements and Compounds

All of the materials and substances that we experience are made up of elements

Atoms and Molecules

The study of what happens when an atom is broken apart is the subject of nuclear physics.

The Periodic Table

The periodic table sorts the elements by chemical properties and are listed horizontally in order by atomic number.

Electron Orbits

Defining the orbits of electrons and the maximum number at any level

Atomic Masses

The relative mass of an individual atom of that element

Avogadro's Number

Avogadro's number, also known as Avogadro's constant, is a fundamental constant in chemistry that represents the number of atoms, molecules, or particles in one mole of a substance.

Self Test

Test your knowledge in atoms and molecules