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Y10 Chemistry TB1 (1.1) (Chemistry (Properties (Physical properties (a…
Y10 Chemistry TB1 (1.1)
Classification of Matters
Matter (anything that occupies space)
Mixture (Not pure)
Do not react with each other
Pure Substance
Elements (cannot be broken down into anything simpler by chemical methods) - 118 elements been discovered
Metals
Non-metals
Semi-metals
The first 20 Elements
a substance that is made up of only one kind of atom
Compounds (made up of two or more elements chemically joined together) - can be broken down
Ionic Compounds
Cations
Anions
Metals (positively charged electrons) lose electrons
Non-metals (negatively charged electrons) gain elements
Covalent Compounds
non-metals sharing electrons to achieve a stable electronic arrangement
Molecules (most covalent compounds are discrete molecules)
May be made up of the same kind of atoms
May be made up of different kinds of atoms
Atoms
The smallest part of an element
Cannot be destroyed, subdivided, or changed from one type to another
Chemistry
Compositions
can be determined by experiment(s)
Structures
can be determined by experiment(s)
Properties
can be determined by experiment(s)
Physical properties
a change in which no new substances are formed
physical state, electrical conductivity, thermal conductivity, solubility, appearance, malleability and ductility, hardness, strength, density, odour
Chemical properties
Chemical reactions that form one or more new substances
Changes
May be observed during the experiment