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What is the best method to classify a chemical substance? - Coggle Diagram
What is the best method to classify a chemical substance?
What is a substance
A particular type of matter with uniform properties
Substances can be split into pure elements and compounds
A compound is the configuration of 2 or more seperate atoms
Water
Carbon dioxide
salt
Pure element substances are the configuration of matter made from a single type of element
Iron
Magnesium
carbon
Mixtures are a result of mixing 2 or more compunds
Salt water
Cement
Blood
What is an element
An element is an atom with the same number of protons. An element is the simplest form of a substance
Properties of a substance
Metallic
Shiny
Malleable
High melting point
Conducts electricity in a solid state
Hard/durable
Covalent Molecular
Does not conduct electricity
Low boiling and melting points
At room temperature can be gas, liquid or a soft solid
Continuous network
High melting point
Ionic
Conductive when molten or in a solution
High melting point
Crystal lattice structuer
Hard and brittle
Structure
Structure is the pattern that atoms are configured within a 3D space
Common structures include
Monoatomic
Atoms that do not form any bonds. These refer to atoms known as Nobel gasses which are atoms with stable amounts of atoms in their outer shell. This means that they are unable to form bonds.
Molecule
Elements or compunds that for a small number of bonds
Network/lattice
Atoms bonded together in a repeating pattern forming a substance
Bonds
There are various types of bonds which occur depending on the circumstances of the atom
Covalent Bonding
Ionic Bonding
Metalic Bonding
How to classify a substance
Physical property test
Metling point test
Conductivity test