C1 Flashcards
(17 cards)
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
Mass number
Total number of protons and neutrons in an atom
What is the electron configuration
2,8,8,2
