atoms are made up from sub-atomic particles:
Proton -relative charge:+1
- relative mass: 1
Neutron -relative charge: 0
-relative mass: 1
Electron -relative charge: -1
-relative mass:1/1836
Isotopes of the same element will have the same proton number but a diffrent number of neutrons. Meaning that diffrent isotopes are chemicially identical as they have the same electron configuration however they are physically diffrent.
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