C1 Flashcards
Compound
Two or more different elements that are joined together in fixed proportions
Element
Substance made up from one type of atom only
Mixture
When different elements and/or compounds are not chemically joined together and can be separated
Are groups and periods, horizontal or vertical
Group - vertical
Period - horizontal
What are reactants
Written at the start of the word equation - what you start with in a chemical reaction
What are products
Written at the end of the word equation - what is made in a chemical reaction
Conservation of mass
In a chemical reaction, mass is never lost or gained.
What is an impure substance
Contains more than one type of compound or element
What is chromatography
- different substances travel different distances up the paper depending on their solubility in the solvent used.
-The more soluble, the further it moves up the paper.
Distillation
Distillation is when two liquids with different boiling points are separated.
Crystallisation
-When a solvent is evaporated from a solute.
Electron
A sub-atomic particle found in the shells of an atom.
Has a charge of -1
Mass is negligible
Neutron
A sub-atomic particle found in the nucleus of an atom
Charge of 0
Mass of 1
Proton
A sub-atomic particle found in the nucleus
Charge of +1
Mass of 1
Atomic number
The number of protons in an atom
