IGCSE Glossary

There are 19 entries in this glossary.
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Glossaries

Term Definition
suspension
Glossaries - GCSE chemistry
Glossaries Description -

In chemistry, a suspension is a heterogeneous mixture that contains solid particles sufficiently large for sedimentation. The particles may be visible to the naked eye, usually must be larger than 1 micrometer, and will eventually settle.

Author - georgie
Hits - 28
Solvent
Glossaries - GCSE chemistry
Glossaries Description -

A substance ( usually a liquid like water) which will dissolve another substance

Author - David Fowkes
Hits - 138
solution
Glossaries - GCSE chemistry
Glossaries Description -

A solution is a liquid mixture in which the minor component (the solute) is distributed within the major components (the solvent)

Author - David Fowkes
Hits - 143
solute
Glossaries - GCSE chemistry
Glossaries Description -

The minor component in a solution, dissolved in the solvent.

Author - georgie
Hits - 136
soluble
Glossaries - GCSE chemistry
Glossaries Description -

A substance is soluble when is can dissolve in another substance ( the solvent)

Author - georgie
Hits - 135
Synonyms - dissolvable
soluble
Glossaries - GCSE chemistry
Glossaries Description -

A substance able to be dissolved in a liquid.

Author - georgie
Synonyms - disintegrable
solubility
Glossaries - GCSE chemistry
Glossaries Description -

Solubility is the measure of how much solute can be added to a solvent until it becomes a saturated solution. The solubility is measured in grams of solute per hundred grams of solvent.

Author - georgie
Hits - 133
saturated solution
Glossaries - GCSE chemistry
Glossaries Description -

A solution becomes a saturated solution when it has the maximum concentration of a solute dissolved in a solvent. After it is saturated any additional solute will not dissolve into the saturated solution.

Author - georgie
Hits - 122
metal
Glossaries - GCSE chemistry
Glossaries Description -

More than 70% of the elements of the periodic table are metals.  All metals conduct an electric current and react by losing electrons. Metals  therefore form positively charged ions when they react.

The structure of metals is often described as a lattice of positively charged ions in a "sea" of delocalised electrons

metallatticesmall

Author - David Fowkes
Hits - 214
Hydrocarbon
Glossaries - GCSE chemistry
Glossaries Description -

 A hydrocarbon is a  compound whose molecules are made up of atoms of carbon and hydrogen only.

The image shows a model of a molecule of methane - the simplest hydrocarbon.

methane

Author - David Fowkes
Hits - 202
hydrocarbon
Glossaries - GCSE chemistry
Glossaries Description -

Any molecule composed only of carbon and hydrogen atoms.

Author - georgie
Hits - 3
EthanolĀ 
Glossaries - GCSE chemistry
Glossaries Description -

Ethanol is the second member of the homologous series known as the alcohols. It has the formula C2H5OH

It is the "alcohol" in alcoholic drinksEthanol 3D balls

Author - David Fowkes
Hits - 153
Synonyms - Ethyl Alcohol
empirical formula
Glossaries - GCSE chemistry
Glossaries Description -

The empirical formula of a substance gives the simplest whole number ratio of atoms in that substance.

For example glucose has the molecular formula C6H12O6 but its empirical fomula is CH2O

empirical formula 2

Author - David Fowkes
Hits - 134
Synonyms - simplest formula
element
Glossaries - GCSE chemistry
Glossaries Description -

All the atoms in an element have the same atomic number.

The elements are listed in the periodic table in order of incresing atomic number.

icon

Author - David Fowkes
Hits - 193
electron
Glossaries - GCSE chemistry
Glossaries Description -

An electron is a sub atomic particle which orbits the nucleus of an atom and carries a negative charge. Often represented by the letter e with a - sign (  e

electron

Author - David Fowkes
Hits - 186