A different way of numbering groups in the periodic table Animation Play

All electromagnetic waves transmit energy Whiteboard exercise Play

Are all atoms of the same element identical? Student activity Play

Arrangement of the elements in the periodic table Whiteboard exercise Play

Atomic masses in the periodic table Student activity Play

Atomic number Whiteboard exercise Play

Atomic number Animation Play

Atomic number Student activity Play

Atomic spectra of elements Whiteboard exercise Play

Atomic spectra of elements Student activity Play

Atomic spectrum of hydrogen Student activity Play

Atoms are electrically neutral Animation Play

Bohr's model of the atom Animation Play

Calculating the isotopic composition of an element Student activity Play

Calculating the relative molecular mass of a compound Whiteboard exercise Play

Calculation of the percentage composition of a given compound Animation Play

Charges of ions of some elements Animation Play

Chlorine isotopes Whiteboard exercise Play

Continuous and line spectra Whiteboard presentation Play

Continuous and line spectra Class activity Play

Dalton's atomic theory Animation Play

Democritus' and Dalton's atomic theories Student activity Play

Detecting the presence of certain elements in a chemical compound Animation Play

Determination of average atomic mass of boron Animation Play

Determination of isotopic composition of silver Animation Play

Determining the composition of a nucleus Animation Play

Determining the composition of atomic nuclei Student activity Play

Determining the composition of atomic nuclei Whiteboard exercise Play

Determining the electron configuration of carbon Animation Play

Determining the electron configuration on the basis of the periodic table Whiteboard exercise Play