C4 Key Terms
- Created by: Lottie_Anderson
- Created on: 05-04-13 11:51
C4 Key Terms
Pink- Higher and Foundation Tier
Blue- Foundation Tier
Alkali metal- Element in Group 1 of the periodic table (lithium, sodium, potassium, rubidium, caesium, francium)
Alkaline- Having a pH greater than 7
Aquifer- Layer of rock that stores a large quantity of water
Atom- Smallest part of an element that can take part in chemical reaction
Atomic number- Number of protons in the nucleus of an atom
Catalyst- Substance that speeds up a reaction without being used up in the reaction
Chemical symbol- Letter or pair of letters used to represent one atom of an element, e.g. H represents one atom of Hydrogen; Fe represents one atom of iron
Chlorination- Addition of chlorine to water to kill microbes
Compound- Substance made up of two or more different elements, chemically combined
Covalent bond- Shared pair of electrons between atoms in a molecule
Covalent compound- Compound in which the atoms are joined together in molecules by covalent bonds
Crystal- Piece of material in which the atoms, molecules, or ions are arranged in a regular three dimensional pattern
Displace- To replace (push out) an element in a compound
Displacement reaction- Reaction in which one element replaces another in a compound
Displayed formula- Description of a covalently bonded compound or element that uses symbols for atoms and that also shows the covalent bonds between the atoms
Distillation- Process by which a liquid is purified by heating it to form a gas and then condensing the gas back to a liquid in a clean container
Dot and cross diagram- Diagram that shows how the electrons are arranged in a molecule or in ions
Electron- Subatomic particle found outside the nucleus of an atom. It has a charge of -1 and a very small mass compared to protons and neutrons
Electronic structure- Arrangement of the electrons in an atom in shells around the nucleus
Element- Substance that consists only of atoms with the same atomic number
Filtration- Process by which smaller particles of solid are removed from a liquid by passing the liquid through a filter
Flame test- Means of identifying metals by observing the colour they produce…
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