COPY: IGCSE Chemistry Definitions Quiz

A solid changing into a liquid.

A liquid changing into a solid.

A gas/vapour changing into a liquid.

A liquid changing into a gas/vapour.

The temperature at which a solid turns into a liquid.

The temperature at which a liquid changes into a solid.

The temperature at which a liquid changes into a vapour at atmospheric pressure.

The random movement of particles from an area of high concentration to an area of low concentration.

Separating an insoluble solid from a liquid.

A fluid that has passed through a filter.

The material that dissolves in a solvent to form a solution.

The mixture formed when a solute dissolves in a solvent.

The liquid in which the solute dissolves to form a solution.

Separating liquids of different boiling points by evaporation and condensing.

The coating of iron by zinc to protect from rusting.

The number of protons in an atom.

The smallest unit of an element, having all the characteristics of that element.

The sum of the protons and neutrons.

The centre of the atom which contains protons and neutrons.

Atoms of the same element with the same atomic number and different number of neutrons.

Made of only one type of atom.

Made of two or more different atoms chemically joined together.

Made of two or more different components which are not chemically joined together.

The columns in the Periodic Table.

The rows of the Periodic Table.

A very strong electrostatic force of attraction between oppositely charged ions.

A very strong electrostatic force of attraction between shared pairs of bonding electrons and the nuclei of their atoms.

A strong electrostatic force of attraction between positive metal ions and their sea of delocalized electrons.

A charged particle resulting from ionic bonding.

A particle formed from covalent bonding which is neutral.

Change in product or reactant concentration per unit time.

Substance which increases the rate of reaction without chemically being changed.

A biological catalyst e.g. Amylase.

The sum of the atomic masses of elements in a compound.

One mole of a substance contains the same number of molecules/atoms as in 12 grams of carbon-12.

A reaction which gives out heat (ΔH is negative).

A reaction which takes in heat (ΔH is positive).

A scale of 0 - 14 which identifies solution as acidic, neutral or alkaline.

A substance with a pH higher than 7.