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9403980
Atomic structure and the periodic table
Description
An overview of everything you need to know for topic 1 AQA chemistry. Please rate and comment so I know haw to improve these resources for future use by other people, thanks :-)
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atoms
chemistry
gcse chemistry
periodic table
compounds
elements
topic 1
atomic structure
bonding
chemistry unit 1
molecules
aqa
gcse
structure
covalent
chemistry
atomic structure and the periodic table
gcse
Mind Map by
Brodie McMeowface
, updated more than 1 year ago
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Created by
Brodie McMeowface
over 7 years ago
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Resource summary
Atomic structure and the periodic table
Atoms
The Nucleus
Protons
Determines what element it is
Positive charge
Neutrons
Determines what isotope it is
neutral charge
Electrons
Move in shells
Determines the period of the element
First shell: 2, second: 8, third:8
Determines what ion it is
More means negative charge
Less means positive charge
negative charge
Neutral and have no charge normally
Protons = electrons
Protons + neutrons = approximate mass number
Elements
Contain molecules with one type of atom
118 currently known with more predicted to be possible
Represented by symbols
Compounds
Made of two or more types of atoms
Chemically linked through bonds
Covalent
Ionic
Metallic
Properties can be totally different from the properties of their elements
Mixtures
Made of two or more types of atoms or compounds
But they are not chemically linked
Properties are normally a mix of the properties of their components
Can be separated without a chemical reaction
Periodic table
Groups
0-7 and transition metals
Group 1: alkaline metals
Very reactve
More reactive down the group as the electron is further from the nucleus
1 electron in the outer shell
soft metals
Low density
Group 7: Halogens
Less reactive as you go down because the outer shell is further away from the nucleus
Very reactive
Colored vapors
Further down, higher melting points
Group 0: noble gasses
Inert
outer shell always has 8 electrons
Further down, higher melting points
Periods
Currently 7
Separating mixtures
Chromatography
Separating mixtures into their components by allowing one to move and one to stay stationary
Paper chromatography separates inks
Filtration and crystallisation
Distillation and fractional distillation
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