Please enable JavaScript.
Coggle requires JavaScript to display documents.
Yr 8 revision - Coggle Diagram
Yr 8 revision
Elements Compounds and Molecules
Elements
Metallic
shiny, solid, malleable, ductile and good conductors of heat and electricity
structure - metallic lattice
atoms can slide and move over each other
non-metallic
brittle, tend to be dull and do not conduct heat or electricity well
structure - non-metallic lattice
atoms strongly bonded makes it brittle
Compounds
Made of more than one type of atom
molecular compounds
small and contain just a few atoms
lattice compounds
strongly bonded and tend to be hard and brittle
Alloy
mix of metals to create better properties
Molecules
made of the same atoms and are mostly non-metallic
Periodic Table
metals and non-metals grouped together
Chemical and Physical Change
Chemical Change
New substances formed
bubbles or gas
new solid in solution
precipitate
Colour change
energy or light is produced or absorbed
exothermic
endothermic
Physical Change
No new substances formed
Changes of state
Melting and freezing
evaporation and condensation
Sublimation
contraction/expansion
Mixing
Dissolving
Evaporation
Filtering
Atomic Model
Atom
Subatomic particles
Proton
=atomic number
Present in the atom nucleus
Electron
= number of protons
present in shells like layers of onion
Neutron
= mass number - atomic number
all matter is made up of atoms
elements are made up of one type of atom
Compounds are made up of more than one type of atom
cannot be created or destroyed