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Chemistry revision Y9 End of Years - Coggle Diagram
Chemistry revision Y9 End of Years
Group 1
Alkaline metals
+1 charge
Group 7
Also known as the Halogens
-1 charge
Ionic Bonding
Transferring of electrons
Ionic lattice (where each particle is next to one with the opposite charge so they attract to eachother)
Ionic compound properties
High boiling/melting point
Can only conduct electricity when molten or dissolved in water
Covalent bonding
Sharing of electrons
Simple molecular covalent
Giant covalent
metallic bonding
between 2 metals
can conduct heat and electricity due to the sea of delocalised electrons
subatomic particles
protons (positive charge 1)
found in the nucleus
equal amounts of protons and electrons
neutrons (neutral charge 0)
found in the nucleus
electrons (negative charge -1)
Orbit the nucleus
also known as valence electrons
formed by the loss or gain of atoms
equal amounts of electrons and protons
Properties of metals
Ductile
malleable
sonorous
High melting/boiling points
Gas tests
Hydrogen (squeaky pop test)
Burning splint
Re-ignited splint
Diatomic (which means an element with 2 or more molecules
Solids, liquids and Gases
Solids
Fixed shape
fixed volume
High energy
Liquids
take the shape of the bottom of the container
can flow
Fixed volume
Medium energy
No fixed shape
Gases
No fixed shape
Low energy
Particles move around freely
In order to become stable, elements have to ha
Changing state
Solid --> Liquid = melting
Liquid --> Solid = freezing
Liquid --> gas = evapouration
gas --> liquid = condensation
gas --> solid = deposition
solid --> gas = sublimation