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The nucleus is at the centre of the atom which is where protons and neutrons are
located.
Electrons orbit the nucleus in shells and the nucleus is small as compared to the total
volume of an atom.
The nucleus makes up the atom's mass as it is very dense .Most…

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Carbon exists as a mixture of

To make them electrically neutral atoms have an overall charge of 0.
Different isotoes of the same element react in the same way because: chemical
reactions involve e- and that neutrons make no difference to chemical reactivity.



IONS

Many atoms react by gaining or…

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