unit 1 — applied science (chem)

What is an element?

One type of atom

Cannot be split up into simpler substances

One word names in periodic table

What is a compound

Two or more different atoms bonded together

Can be split up into simpler substances

What is a mixture

Contains several different substances not bonded together

Can be separated by physical processes

Examples of physical processes

Filtration

Distillation

Evaporation

What are the three forms of matter

Solid, liquid, gas

Properties of solid

Particles close together, arranged regularly, not moving just vibrating.

Properties of liquid

Particles close together, arranged regularly randomly and moving past each other.

Properties of gas

Particles long way apart, arranged randomly, moving in all directions and colliding with each other.

Physical property

Does not involve a chemical change happening. E.g. melting point, boiling point and electrical conductivity.