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Matter - Properties and Changes - Coggle Diagram
Matter - Properties and Changes
Physical/Chemical Changes
Chemical Changes
Changes the matter itself
Rearranges the atoms in a substance
Ex) Rusting, decomposition, Tarnish
Physical Changes
EX: Transition between physical states of matter (melting, evaporation, condensation, freezing, sublimation, deposition)
The matter itself stays the same
(Usually) easily reversible
Types of Matter
Mixtures
Heterogenous Mixture
ex) Cereal
Homogenous Mixture (Solution)
EX: Alloy
Mixture of a metal and another element
Used to reinforce wanted characteristics and weaken unwanted characteristics
Methods for Separation
Filtration
Distillation
Chromatography
A mix of pure substances (compounds/elements)
Pure Substances
Element
Ex) Oxygen (O)
Made of one type of atom
Compound
Ex) Carbon Dioxide (CO2)
Made of more than one types of atom
Properties
Physical Properties
EX: boiling point/melting point, states of matter, ductility, malleability, density, etc.
Measured without chemical change
Chemical Properties
EX: Combustibility (ability to burn), Sensitivity to light (how a substance reacts when exposed to light), Reactivity (how easily a substance reacts to other substances)
Requires Chemical change to measure
Laws
Law of conservation of mass
Mass is never created nor destroyed
In a chemical reaction, the mass of the reactants and products are the same
Law of definite proportions
% mass of element = mass of element / total mass x 100
The ratio/proportions do not change as the total amount increases
Same compounds have the same formula. (and proportions of mass of elements are same)