Lithium atomic no. is 3 and their also electrons and protons are 3 but neutrons is 4. why??
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Explanation:
That is 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.
Isotopes are elements with same atomic number but
Isotopes are elements with same atomic number but different atomic mass number
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