Elements Flashcards
Give an example with the symbol of a gas
Oxygen O
Hydrogen H
Helium He
Give an example of a liquid
Mercury
Name some metals and their symbols
Potassium K
Iron Fe
Calcium Ca
Sodium Na
Given example of a solid element
Carbon C
What is a molecule
When atoms joined together in a group
What is a mixture
When two or more elements or compounds are mixed but not combined
What is a compound
When two or more elements have combined together
For example one atom of carbon and two atoms of oxygen makes carbon dioxide
Or one atom of magnesium and one atom of oxygen combine and make magnesium oxide
When ever oxygen is combined with another element what is formed formed is an oxide so iron plus oxygen equals iron oxide
Similarly chlorine makes a chloride and sulphur makes a sulphide
What is an atom
An atom is the smallest amount of element that can take part in a chemical reaction
What is hydrochloric acid made up of
Hydrogen and chlorine
What is copper carbonate made up of
Copper carbon and oxygen
How many kinds of atom are there in gold silver and bronze
Gold one, silver one, bronze to
What is a 10p coin made up of
Copper and nickel
What changes happen in a chemical reaction and a physical reaction
Physical reactions, these don’t produce new substances and are reversible. For example ice cubes melting - these are not chemical reactions
Chemical, these produce new substances and on non-reversible. Four example lighting a match
What are the signs of a chemical reaction
Change of colour Fizz or bubbles Change of temperature Smell Light given out Precipitate formed
Is he eating sugar a chemical reaction? What happened?
Yes, the colour of the sugar changes it turns to liquid and some gas is given out
