Answer:
Atomic mass of lithium is 7
Explanation:
Atomic mass is the mass of an atom and it is determined by the nucleus of an atom because the mass of electrons are very negligible.
Numerically, the mass of an atom = atomic number + number of neutrons
Atomic number is the total number of protons present in the nucleus of an atom.
Hence, atomic mass of lithium is
3 + 4 = 7
where 3 is the atomic number of lithium and 4 is the number of neutrons in lithium
