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centre part of an atom with positive charge concentrated in a tiny kernel.
an atom with a unique atomic number and unique mass number.
molecule where the ratio of atoms is 1 : 6 , e.g. SF6
John Bransby is a former principal and examiner and is currently a Maths and...
when a reaction produces a gaseous product that is allowed to escape.
an area or region where there is a high probability (95% chance) of finding electrons. Each...
study of hydrocarbons and other organic compounds.