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

Abundance of chemical elements in nature Whiteboard exercise Play

Abundance of chemical elements in nature Student activity Play

Abundance of elements in nature Slideshow Play

Abundance of the elements in the crust and in the whole Earth Animation Play

Abundance of the principal elements in the Universe Slideshow Play

Across the periodic table Student activity Play

Addition of elements to alkenes Whiteboard exercise Play

Addition of elements to alkenes Student activity Play

Application of transition elements and their compounds Slideshow Play

Applications of elements arising from their conductivities Slideshow Play

Arrangement of chemical elements in the periodic table Student activity Play

Arrangement of the elements in the periodic table Whiteboard exercise Play

Atom – the basic component of matter Animation Play

Atomic and ionic radii Simulation Play

Atomic masses in the periodic table Student activity Play

Atomic number Animation Play

Atomic number Student activity Play

Atomic numbers and mass numbers of the elements Animation Play

Atomic radii Simulation Play

Atomic radii Student activity Play

Atomic radii Whiteboard exercise Play

Atomic radii of the s-block elements Student activity Play

Atomic radii of the s-block elements Whiteboard exercise Play

Atomic spectra of elements Student activity Play