In Chemistry, In the following type of shorthand, what does the number next to the element name mean? Hydrogen-3

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04-11-2014
Chemistry

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In Chemistry, In the following type of shorthand, what does the number next to the element name mean? Hydrogen-3

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jamiesm jamiesm · Answer 1 · 2014-11-04T14:26:50-05:00

jamiesm jamiesm

04-11-2014

the number is the mass number

the mass number is the number of nucleons (total number of protons and neautrons in the nucleus) so in hydrogen-3 there are 3 nucleons and as hydrogen has 1 proton, there are 2 neutrons

carbon 12 has 12 nucleons (6 protons and 6 neutrons) and carbn 13 has 13 nucleons (6 protons and 7 neutrons)

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