Chemistry yr9 Flashcards
What is an atom
Smallest part of an element
What is a molecule
Two or more atoms chemically bonded together
What is an element
A substance made up of only one type of atom
What is a compound
Substance made from two or more elements chemically bonded together
What is a mixture
Two or more substances mixed together but do not react together
What is an isotope
Atoms of the same element but with different numbers of neutrons
What is the law of conservation of mass
Mass is never gained or lost in a chemical reaction
What is filtration
Using a filter to separate an insoluble solid from a liquid
What is crystallisation
Evaporating away the liquid (solvent) leaving the solid crystals (solute) behind
What is simple distillation
Separates a liquid from a solution. The solution is heated, it evaporates and then condenses for collection
What is fractional distillation
Separates multiple liquids from a solution, based on boiling points
What is chromatography
Separating solvable substances from one another
What is the relative charge of a proton
+1
What is the relative charge of a neutron
0
What is the relative charge of an electron
-1
What is the relative mass of a proton
1
What is the relative mass of a neutron
1