Sun, sea, sand and air. Elements, compounds or mixtures?
An Exothermic reaction. Acetylene (Ethyne) releases a lot of energy when it burns.
Enter your text here ... Introduction Every chemical reaction has an accompanying change in energy. Some reactions release energy to the surroundings...
Questions :
Crude oil is a mixture of alkanes ( hydrocarbons)
Use the animation to measure the bond angles in each of the three molecules below:
a game to test your skills
The images below show how an ionic lattice forms
Enter your text here ... The halogens are a family of elements in group 7 (aka 17) of the periodic table. in this video, you can see how reactive ...
image to show the tetrahedral shape of the methane molecule
the alkanes are a family of hydrocarbons. hydrocarbons are compounds containing hydrogen and carbon only. methane is the simplest hydrocarbon wit...
Universal indicator is useful for giving an estimated value for the pH of a substance
Background You should already know that: • some substances are acidic • the opposite of acidic is alkaline • acids and alkalis can be harm...