Properties and uses of substances
Covalent bonding
A covalent bond is a shared pair of electrons. Covalent bonding results in the formation of molecules or giant structures. Substances with small molecules have low melting and boiling points and do not conduct electricity. Giant covalent substances have very high melting points.
The properties and applications of novel materials
The use of nano-scale particles is relatively new, and it is still unclear what their long term effect might be on health and the environment. Smart materials include thermochromic pigments, shape memory polymer, shape memory alloy and hydrogels.
Conservation of mass
Reaction information is shown using word and symbol equations. The simplest ratio of atoms of each element in a compound is called the empirical formula. Mass is conserved in chemical reactions.
Video playlist
The uses of polymers. Video
An explanation of what polymers are and some of their uses.
Filtration and distillation. Video
Demonstrates how to separate sand and salt from water by filtration and distillation.
Atoms and isotopes. Video
An introduction to how protons, neutrons and electrons make up atoms.
Atomic structure. Video
An introduction to atomic structure, including protons, neutrons and electrons.
