the atomic no. of lithium is 3 it mass no. is 7 how many proton and neutron are present in lithium atom
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atomic no. = proton no.
(mass no. - proton no.) = neutron no.
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himadrisingh2000:
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Notice that because the lithium atom always has 3 protons, the atomic number for lithium is always 3. The mass number, however, is 6 in the isotope with 3 neutrons, and 7 in the isotope with 4 neutrons.
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