Part 3 Hard Chemistry To Learn - Chemistry Edexcel IGCSE

An electrostatic attraction between two nuclei and a shared pair of electrons

A substance that is made of only one type of atom and cannot be broken down into other substances

Atoms with different numbers of neutrons but the same numbers of protons and electrons

How many particles does one mole of a substance contain?

The simplest whole number ratio of the atoms of each element present in one molecule or formula unit of a compound

Shows the actual number of atoms in the compound

Select the boxes that refer to solids

• Strong forces of attraction

• Regular lattice formation

• Particles close together

• Particles vibrate in fixed positions

• Random arrangement

Select the boxes that refer to solids

• Do not flow

• Maintains a definite shape and volume

• Expands when heated

• Least energy

• Particles constantly move with random motion

Select the boxes that refer to liquids

• Weak forces of attraction

• Random arrangement

• Particles free to move past each-other

• Particles stick closely together

• Very weak forces of attraction

Select the boxes that refer to liquids

• Definate volume

• No definite shape

• Flows to fill base of container

• Regular lattice formation

• Strong forces of attraction