Allotrope: The different molecular forms in which an atom can exist.
Covalent bond: A bond involving the attraction of a pair of electrons and a pair of nuclei from two non-metal atoms
Diamond: An allotrope of carbon with a tetrahedral structure. Used in jewellery and in power tools, as it is the hardest material naturally occurring on Earth and can cut through virtually any solid.
Intermolecular forces: The weak forces of attraction between covalent molecules
Graphite: An allotrope of carbon in a layered structure that easily slides. Used in pencils and as a lubricant, as it transfers easily and slides easily.
Tetrahedral: An atom directly bonded with four other atoms: it has four covalent bonds. Structure of diamond.
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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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