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The Periodic table (Elements and their symbols (Sodium – (Na), Potassium –…
The Periodic table
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Metals and non-metals
Chemical properties (e.g. flammability, pH, reaction with acid)
Physical properties (e.g. melting point, boiling point, density)
Metal properties:
High melting points
Good conductors of heat and electricity
Shiny (when polished)
Strong and flexible
Malleable
Non-metal properties:
Low melting point
Brittle (when solid)
Not shiny
Poor conductors of heat and electricity.
Word equations
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Signs of a chemical reaction include:
:red_circle:Colour change
:wind_blowing_face:Gas produced
:large_blue_diamond:Solid formed from solution
:racing_car:Energy change
Dalton's atomic theory
Dalton stated that:
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:explode: Atoms are indestructible, cannot be created, or destroyed.
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:large_blue_circle::large_blue_circle::red_circle::red_circle:In compounds, each atom of an element is always joined to a fixed number of atoms of the other element.
During chemical reactions, atoms rearrange, to make new substances: