Chemisty C4

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Relative Atomic Mass
The mass of an atom of an element compared to the mass of an atom of carbon. The relative atomic mass of carbon is defined as 12.
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Periodic
A repeating pattern in the properties of elements.
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Period
A row in the periodic table.
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Group
A column in the periodic table.
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Alkali Metal
An element in group 1 of the periodic table. Alkali metals react with water to form alkaline solutions of the metal hydroxide.
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Tarnish
When the surface of a metal becomes dull or discoloured because it has reacted with the oxygen in the air.
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Crystalline
A material with molecules, atoms or ions lined up in a regular way as in a crystal.
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Salt
An ionic compound formed when a metal reacts with a non-metal
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Trends
A description of the way a property increases of decreases along a series of elements or compounds, which is often applied to the elements in a group or period.
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Physical Properties
Properties of elements or compounds such as melting point, density and electrical conductivity. These are properties that do not involve one chemical turning into another.
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Chemical Properties
A chemical property describes how an element or compounds interacts with other chemicals.
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Chemical Change
A change that forms a new chemical.
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Molecules
A group of atoms joined together.
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Chemical Equation
A summary of a chemical reaction showing the reactants and products with their physical states.
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Formulae
A way of describing a chemical that uses symbols for atoms. A formula gives information about the numbers of different atoms in the chemical.
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Balance Edquation
An equation showing the formulae o the reactants and products. There are the same number of each kind of atom on both sides of the equation.
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Halogens
The name of the group 7 elements.
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Diatomic
molecule with 2 atoms
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Toxic
A chemical that may lead to serious health risks or even death.
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Corrosive
A chemical that may destroy living tissue on contact.
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Bleach
A chemical that can destroy unwanted colours and kill bacteria.
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Displacement Reactions
When a more reactive halogen will displace a less reactive halogen.
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Harmful
A chemical that may cause damage to health if swallowed breathed or absorbed through the skin.
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Flame Colour
A colour produced when a chemical is held in a flame. Some elements and their compounds give characteristic colours.
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Line Specturm
A spectrum made up of a series of lines when the light from a flame test is split into different colours using a prism.
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Spectroscopy
The use of instruments to produce spectra. The spectra are analysed to study elements/compounds.
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Nucleus
The central part of an atom where the protons and neutrons are found. The mass of an atom is concentrated in its nucleus.
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Protons
The particle present in the nuclei of atoms. Protons are positively charged.
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Neutrons
An uncharged particle found in the nucleus of atoms.
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Electrons
A tiny, negatively charged particle found orbiting the nucleus in an atom.
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Proton Number
The number of protons in the nucleus of an atom.
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Sub-atomic particles
The particles that make up atoms – protons, neutrons and electrons.
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Energy Level
The electrons in an atom have different energies and are arranged at distinct energy levels.
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Shell
A region in space around the nucleus of an atom where there can be electrons.
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Electron Arrangement
The number and arrangement of electrons in an atom of an element
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Molten
A chemical in the liquid state. A chemical is molten when the temperature is above its melting point but below its boiling point.
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Ions
An electrically charged atom or group of atoms.
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Electrolysis
Splitting up a chemical into its elements by passing an electric current through it.
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Other cards in this set

Card 2

Front

A repeating pattern in the properties of elements.

Back

Periodic

Card 3

Front

A row in the periodic table.

Back

Preview of the back of card 3

Card 4

Front

A column in the periodic table.

Back

Preview of the back of card 4

Card 5

Front

An element in group 1 of the periodic table. Alkali metals react with water to form alkaline solutions of the metal hydroxide.

Back

Preview of the back of card 5
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