GCSE AQA chemistry Unit 1- atomic structure and the periodic table

10/10/23, 9:05 AM GCSE AQA chemistry Unit 1- atomic structure and the periodic table




Atomic structure and the periodic table
Key words:
Atom- very small thing
Element- single type of atom found on the periodic table
Compound- 2 or more elements that are chemically bonded together


Elements:
Protons- mass 1 - charge +1
Neutrons- mass 1- charge 0
Electrons- mass 1/2000 - charge -1




Chemical equations:
Water Hydrogen + oxygen
H 0 H +0


Carbon dioxide- CO
Water-H O
Oxygen- O
Hydrogen-H
Hydrochloric acid-HCL
Sulphuric acid- H SO


Seperating mixtures:
Distillation- separate things by boiling point
Evaporation- remove liquid
Filtration- large particles of solid in a liquid
Fractional distillation- different boiling points




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, 10/10/23, 9:05 AM GCSE AQA chemistry Unit 1- atomic structure and the periodic table




Chromatography- used to separate mixtures of soluble substances




History of the atom:
Plum pudding model- ball of positive charge with negative electrons dotted around


Rutherford- positively charged alpha particles Thin sheet of gold foil

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