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Chemistry – Ionic and covalent bonding, polymers and materials

Chemistry –    Ionic and covalent bonding, polymers and materials

Atoms and Compounds

Atomic number and mass number describe an atom:

 

Compounds are when two are more atoms chemically join together – e.g. carbon dioxide – they are hard to separate

Isotopes: Isotopes are the different atomic forms of the same element, which have the same number of protons but a different number of neutrons – this means they will have the same atomic number (the same number of protons) but a different mass number

E.g. Carbon -12 and carbon-14 are a popular pair of isotopes

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