Absorption of visible light. Colorimetry Class activity Play

Absorption of visible light. Colorimetry Whiteboard presentation Play

Absorption spectra Student activity Play

Absorption spectrum of Co(II) ions Whiteboard exercise Play

Alkali metals Class activity Play

Alkali metals Whiteboard presentation Play

Alpha decay Animation Play

Assigning electrons to atomic orbitals Student activity Play

Assigning electrons to atomic orbitals Whiteboard exercise Play

Atomic and ionic radii Simulation Play

Atomic and molecular mass Whiteboard presentation Play

Atomic and molecular mass Class activity Play

Atomic bomb Student activity Play

Atomic bomb Animation Play

Atomic bomb Whiteboard exercise Play

Atomic mass and atomic radii Illustration Play

Atomic mass of an element Animation Play

Atomic mass of an element Student activity Play

Atomic mass of an element Whiteboard exercise Play

Atomic masses in the periodic table Student activity Play

Atomic number Animation Play

Atomic number Whiteboard exercise Play

Atomic number Student activity Play

Atomic number and mass number Student activity Play

Atomic numbers and mass numbers of the elements Animation Play