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67689
Elements, mixtures ‘n’ compounds
Descrição
AQA IGCSE Chemistry (yr 8) Mapa Mental sobre Elements, mixtures ‘n’ compounds, criado por Emma Boxley em 02-05-2013.
Sem etiquetas
chemistry
eoy exams yr 8
chemistry
yr 8
aqa igcse
Mapa Mental por
Emma Boxley
, atualizado more than 1 year ago
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Criado por
Emma Boxley
mais de 11 anos atrás
71
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0
Resumo de Recurso
Elements, mixtures ‘n’ compounds
Testing for Gases
Carbon Dioxide
Will make limewater go milky
Hydrogen
Will make a burning splint go out with a squeaky pop
Oxygen
Will relight a just burning splint
Will make a burning splint shine brighter
The Periodic Table
The metals are on the left
Group 1 metals are the most reactive
They react with water and air
The transition metals are in the middle
The non-metals are on the right
The only two elements that can be liquid at room temp. are mercury and bromine
Definitions
Condensation
When a gas turns into a liquid
Solidyfying
When a liquid turns into a solid
Normally by freezing
Sublimination
The change of a state straight from a solid to a gas
Dry ice
Evaporation
Liquid to a gas
Melting
Solid to a liquid
Melting and boiling points definitions
Melting points
Between its melting point and boiling point a substance is a liquid
Below its melting point it is a solid
Boiling points
Above its boiling point a substance is a gas
Melting and boiling points of some substances
Oxygen
Melting point= -218C
Boiling point -183C
25C is above its boiling point so then the oxygen is a gas
Mixtures and Compunds
Mixtures
Are easy to separate
2 or more different atoms
Are not combined
Compounds
Atoms may form molecules
Molecules are two or more atoms joined together
Atoms of two or more elements are held together by a chemical bond
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