Displacement reaction: A reaction in which a less reactive molecule is replaced with a more reactive molecule.
Dissociation: the splitting of a molecule into smaller molecules, atoms, or ions, especially by a reversible process
Group 7: The seventh group of the periodic table. Elements in this group have 7 valence electrons and are known as halogens. They share similar properties due to their similar electronic configurations.
Halogen: A group 7 element. Examples include chlorine and bromine.
Non-polar: A substance in which the electrons are shared equally between the nuclei, resulting in an even distribution of charge.
Oxidation: Loss of electrons
Polar: A substance in which the molecules are arranged so one end has a positive charge and on has a negative charge.
Reactivity series: The order of reactivity
Redox Reaction: A reaction in which electron(s) are transferred from one molecule to another. The molecule losing an electron is oxidised, and the one gaining is reduced.
Reduction: Gain of electrons
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Section 3 a) Specification
3.1 explain the terms homologous series, hydrocarbon, saturated, unsaturated, general formula and isomerism. A homologous series is a grou...
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The group 7 elements, also known as halogens, are F, fluorine, Cl, chlorine, Br, bromine, I, iodine, and At, astatine. They all have antimic... -
Metals can be placed in an order of most to least reactive, called the reactivity series. This can be remembered using an acronym: Plea... -
Particles of a substance can be present in different physical states, the states of matter. They are solid, liquid and gas, and increasing ...
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