Arrangement of chemical elements in the periodic table Student activity Play

Chemical equations Student activity Play

Essential elements Whiteboard exercise Play

Essential elements – macro-elements; trace elements and ultra-trace elements Student activity Play

Macro-elements; trace elements and ultra-trace elements Slideshow Play

Macroelements Student activity Play

Molecules with five electron pairs (2) Student activity Play

Names and symbols of elements Student activity Play

Names and symbols of elements Animation Play

The arrangement of chemical elements in the periodic table Whiteboard exercise Play

The names of elements Animation Play

The structure of selenium fluoride Whiteboard exercise Play

Trace elements and ultra-trace elements Student activity Play