C1.1 Keywords

Chemical reaction (3) - C1:3

a reaction in which the atoms are rearranged.

Group (2) - C1:2

a collection of elements found in the same column of the periodic table with similar properties.

Electron (2) - C1:2

a negatively charged sub-atomic particle found in the electron shells (energy levels) of an atom with a negligible mass.

Proton (2) - C1:2

a positively charged sub-atomic particle found in the nucleus of an atom with a mass of 1.

Neutron (2) - C1:2

a sub-atomic particle that has no overall charge found in the nucleus of an atom with a mass of 1.

Element (2) - C1:2

made up from only one type of atom.

Atomic number (2) - C1:2

the number of protons found in the nucleus of an atom of an element.

Atom (2) - C1:2

the smallest constituent unit of ordinary matter.

Chemical symbol (1) - C1:1

a symbol used to represent each element in the periodic table that is recognised across the world.

Isotope (1) - C1:1

an atom of the same element with the same number of protons but a different number of neutrons.

Condense (1) - C1:1

change in state from gas to liquid.

Evaporation (1) - C1:1

change in state from liquid to gas.

Insoluble (1) - C1:1

incapable of being dissolved.

Compound (1) - C1:1

made up from two or more different types of atom chemically combined.

Liquid (1) - C1:1

particles are close together and arranged and move in a random way.

Gas (1) - C1:1

particles are far apart and arranged in a random way.

Solid (1) - C1:1

particles packed tightly together and are arranged in a regular pattern and vibrate around a fixed point.

Distillation (1) - C1:1

process that can be used to separate a pure liquid from a mixture of liquids.

State of matter (1) - C1:1

solids, liquids and gases are called the three states of matter.

Aqueous solution (1) - C1:1

solution in which water is a solvent.

Medium (1) - C1:1

state of matter such as solid, liquid or gas.

Relative atomic mass (1) - C1:1

the average mass of an atom when taking into consideration the proportions of the different isotopes of an element.

Radius (1) - C1:1

the distance from the centre to the circumference of a circle or sphere.

Boiling point (1) - C1:1

the point at which particles have enough energy to overcome the intermolecular forces holding them together.

Energy level (1) - C1:1

the shells that electrons are arranged into around the nucleus of an atom with the innermost shell being the lowest energy level.

Mass number (1) - C1:1

the total number of protons and neutrons within an atom of an element.

Mixture (1) - C1:1

two or more elements or compounds not chemically combined together.