AQA CSTR Chemistry Paper 1 Definitions

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

• Alkali metals

• Noble gases

• Halogens

• Transition metals

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

• atoms

• molecules

• cells

• particles

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

• atomic nucleus

• electron cloud

• isotope

• valence shell

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

• atomic number

• mass number

• isotope number

• atomic mass

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

• chromatography

• distillation

• filtration

• sublimation

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

• compound

• element

• mixture

• solution

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

• crystallisation

• filtration

• distillation

• sublimation

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

• displacement

• combination

• decomposition

• neutralisation

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

• electron

• proton

• neutron

• positron

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

• electron shells

• proton bands

• neutron zones

• atomic cores