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IGCSE Glossary

There are 11 entries in this glossary.
Search for glossary terms (regular expression allowed)

Glossaries

Term Main definition
Acid
Glossaries - GCSE chemistry
Glossaries Description -

A substance with a pH value of less than 7 and which releases hydrogen ions (H+(aq)) when in water. 

Examples of acids are :HCl (hydrochloric acid), H2SO4 (Sulfuric acid), HNO3 (Nitric acid)

Author - David Fowkes
Hits - 2500
activation energy
Glossaries - GCSE chemistry
Glossaries Description -

The least possible amount of energy required to start a reaction.

Author - georgie
Hits - 2459
Albert Einstein
Glossaries - GCSE chemistry
Glossaries Description -
Albert Einstein 14 March 1879 – 18 April 1955) was a German-born theoretical physicist, widely acknowledged to be one of the greatest physicists of all time. Einstein is known for developing the theory of relativity, but he also made important contributions to the development of the theory of quantum mechanics. Relativity and quantum mechanics are together the two pillars of modern physics.
Author - Vasyl
Hits - 1159
Alexander Graham Bell
Glossaries - GCSE chemistry
Glossaries Description -
Alexander Graham Bell (; born Alexander Bell, March 3, 1847 – August 2, 1922) was a Scottish-born inventor, scientist, and engineer who is credited with inventing and patenting the first practical telephone.
Author - Vasyl
Hits - 1085
aluminium carbonate
Glossaries - GCSE chemistry
Glossaries Description -

aluminium carbonate

Author - David Fowkes
Hits - 2499
ammonia
Glossaries - GCSE chemistry
Glossaries Description -

Ammonia is a compound of nitrogen and hydrogen with the formula NH3.

Ammonia is a colourless gas with a distinct pungent smell. It is a common nitrogenous waste, particularly among aquatic organisms, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to 45 percent of world's food and fertilizers

Author - Vasyl
Hits - 972
ammonium sulfate
Glossaries - GCSE chemistry
Glossaries Description -

ammonium sulfate

Author - David Fowkes
Hits - 2512
anode
Glossaries - GCSE chemistry
Glossaries Description -

the positive electrode in an electrolysis circuit

Author - David Fowkes
Hits - 2492
Atmosphere
Glossaries - GCSE chemistry
Glossaries Description -
An atmosphere is a layer of gas or layers of gases that envelope a planet, and is held in place by the gravity of the planetary body. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low.
Author - Vasyl
atom
Glossaries - GCSE chemistry
Glossaries Description -

atom2

 

The smallest particle of an element which still retains all the properties of the element

 

Author - David Fowkes
Hits - 3545
Atomic number
Glossaries - GCSE chemistry
Glossaries Description -

The number of protons in the nucleus of an atom. Also known as the proton number

atomic number

Author - David Fowkes
Hits - 3251
Synonyms - Proton number

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