AQA CSTR Chemistry Paper 1 Definitions

Front

The elements in Group 1 of the periodic table are called _________.

Back

Alkali metals

Front

The smallest part of an element that can exist. All substances are made up of _________.

Back

atoms

Front

Positively charged object composed of protons and neutrons at the centre of every atom with one or more electrons orbiting it is called the _________.

Back

atomic nucleus

Front

The number of protons in the nucleus is called the _________.

Back

atomic number

Front

A separation technique used to separate a mixture of chemicals by distributing the components between two phases is called _________.

Back

chromatography

Front

A substance made up of two or more types of atoms chemically combined together is called a _________.

Back

compound

Front

A separation technique used to produce solid crystals from a solution by evaporating the solvent is called _________.

Back

crystallisation

Front

A chemical reaction in which a more reactive element displaces a less reactive element from its compound is called _________

Back

displacement

Front

Negatively charged subatomic particle which orbits the nucleus at various energy levels is called an _________.

Back

electron

Front

Different energy levels in atoms occupied by electrons are called _________.

Back

electron shells