The Periodic table

Dalton's atomic theory

Dalton stated that:

🔵All matter is made up of tiny particles called atoms.

💥 Atoms are indestructible, cannot be created, or destroyed.

🔵🔵🔵The atoms in an element are all identical.

🔵🔵🔴🔴In compounds, each atom of an element is always joined to a fixed number of atoms of the other element.

Word equations

During chemical reactions, atoms rearrange, to make new substances:

hydrogen + chlorine =>hydrogen chloride
R E A C T A N T S => P R O D U C T S

Signs of a chemical reaction include:
🔴Colour change
🌬Gas produced
🔷Solid formed from solution
🏎Energy change

Elements and their symbols

Sodium – (Na)

Potassium – (K)

Iron – (Fe)

Copper – (Cu)

Silver – (Ag)

Tin – (Sn)

Gold – (Au)

Mercury – (Hg)

Lead – (Pb)

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.

To remember: