atomic number Ga = 31
mass of isotope 1 = 68.926 amu ≈ 69 amu
mass of isotope 2 = 70.925 amu ≈ 71 amu
Gallium (Ga) consists of two naturally occurring isotopes with masses of 68.926 and 70.925 amu.
Write the complete atomic symbol for each, showing the atomic number and mass number.
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