Ammonia Animation Play

Appearance of the dates Whiteboard exercise Play

Application of transition elements and their compounds Slideshow Play

Arrangement of chemical elements in the periodic table Student activity Play

Arrangement of the elements in the periodic table Whiteboard exercise Play

Arrangements by the table Animation Play

Arrangements by the table Student activity Play

Atomic mass and atomic radii Illustration Play

Atomic mass of an element Student activity Play

Atomic mass of an element Animation Play

Atomic masses in the periodic table Student activity Play

Atomic number Student activity Play

Atomic number Animation Play

Atomic number and mass number Student activity Play

Atomic radii Student activity Play

Atomic radii of alkali metals Animation Play

Atomic radii of the s-block elements Student activity Play

Atomic radius Student activity Play

Avogadro's number Student activity Play

Balls on a billiards table Animation Play

Bar chart Whiteboard exercise Play

Basic periods of trigonometric functions Student activity Play

Beats Animation Play

Beats Student activity Play

Billiard ball collisions and the velocity vectors Student activity Play