Final answer:
The approximate atomic mass of hydrogen is 1. The overwhelming majority of hydrogen atoms are hydrogen-1, atomic mass= 1, leaving only a minute percentage, 0.015% as hydrogen-2, atomic mass =2. As such, the atomic mass strongly tilts towards 1 due to the far greater prevalence of hydrogen-1.
Step-by-step explanation:
The atomic mass of hydrogen is generally estimated near 1 since most hydrogen atoms are hydrogen-1 (99.985%) which has an atomic mass near to 1. The remainder of hydrogen atoms (0.015%, mostly hydrogen-2) have an atomic mass near to 2. Thus, atomic mass is calculated with these percentages and the atomic masses of isotopes. However, due to the overwhelming prevalence of hydrogen-1, the approximate atomic mass of hydrogen is generally expressed simply as 1.
This relative atomic mass is useful due to hydrogen's key role in various scientific fields, including chemistry and astrophysics, where it is fundamental to the study of stars' composition and the universe's most abundant element.
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