Summary
AQA GCSE 9-1 Chemistry Atomic Structure topic summary
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A summary of the AQA GCSE chemistry specification for the ? Atomic Structure topic.
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ELEMENT: Made up of 1 type of atom. Chromatography:Distance travelled factor(RF) = distance travelled by spot / distance travelled by so
COMPOUND: More than 1 type of atom This will be between 0 and 1.
chemically bonded. The properties of elements in
groups will be similar
CHROMOTOGRAPHY: A series of Structure of an atom:
techniques that separates a mixture of An atom is structured in cells, using its atomic number.
compounds. The protons and neutrons are found in the middle of the atom, this makes up the
The electrons are found around the edge of the atom, in a shell format.
IONS: A charged atom or molecule. The atom of an element contains an equal number of protons and neutrons, so th
overall charge.
ISOTOPES: Variants of a particular
chemical element which differ in
neutron numbers. ATOMIC STRUCTURE
Word and symbol equation Balancing equations:
example: Box everything
You cannot write in the box.
You can have multiple boxes.
Add numbers so you have the same
amount on both sides of the equation.
Particle Mass Charge
Proton 1 +1
State symbols: You can separate compounds and
Neutron 1 0
Solid – s Liquid – l Gas – g mixtures but you cannot separate
Dissolved in water – aq Electron 0 -1 chemically bonded compounds (atom
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