Answer
Carbon: $^{12}_6C$
Hydrogen: $^{1}_1H$
Oxygen: $^{16}_8O$
Nitrogen: $^{14}_{7}N$
Phosphorous: $^{31}_{15}P$
Sulfur: $^{32}_{16}S$
Work Step by Step
Carbon:
The most common isotope of Carbon is $^{12}_6C$ with an atomic mass of 12 and 6 protons.
Hydrogen: The most common isotope of Hydrogen is $^{1}_1H$ with an atomic mass of 1 and 1 proton.
Oxygen: The most common isotope of Oxygen is $^{16}_8O$ with an atomic mass of 16 with 8 protons.
Nitrogen: The most common isotope of Nitrogen is $^{14}_{7}N$ with an atomic mass of 14 with 7 protons.
Phosphorous: The most common isotope of Phosphorus is $^{31}_{15}P$ with an atomic mass of 31 and 15 protons.
Sulfur: The most common isotope of Sulfur is $^{32}_{16}S$ with an atomic mass of 32 and 16 protons.
