GCSE chemistry

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chemistrygcse

Ion

A charged atom

Electron Atomic

Particle with charge of -1

Neutron Atomic

Particle with no charge

Halogen

A group 7 element

Atomic Mass

A unit of mass equal to 1/12 the mass of carbon 12

Atomic number

The number of protons in an atom

Alkali Metal

Any group 1 metal

Noble Gases

Any Group 0 element

Covalent Bonding

Sharing of pairs of electrons between atoms

Electrolysis

Split a compound by passing electricity through a solution containing ions

Formula Mass

Total atomic mass of a compound

Fluorine

The most reactive halogen

Lithium

The least reactive alkali metal

Relative Atomic Mass

Mass of an atom in atomic mass units

Isotope

Element with the same atomic number as another element but a different atomic mass

Mass Number

Sum of the number of neutrons and protons in an atomic nucleus

Atom

Smallest component of an element having the chemical properties of the element

First Ionisation Energy

Energy needed to remove the most loosely held electron from one mole of gaseous atoms