In the symbol (4/2)He, the superscript 4 is the for helium, and the subscript 2 is the for helium.
2 answers:
The superscript 4<span> is the atomic mass for </span>helium, and the subscript 2<span> is the atomic number for </span>helium<span>.
the given symbol is
⁴₂He
subscript for the element is the atomic number of the element
atomic number is the number of protons . atomic number is characteristic for the element
superscript is the mass number. mass number is the sum of protons and neutrons. mass number means the atomic mass.
therefore atomic number is 2 and mass number is 4
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