Question
Which best explains why hydrogen's atomic number and average atomic mass are very close to the same?(1 point)
Responses
Very few atoms of hydrogen contain neutrons.
Very few atoms of hydrogen contain neutrons.
Hydrogen is stable with two protons in its outer energy level.
Hydrogen is stable with two protons in its outer energy level.
Hydrogen only has one electron.
Hydrogen only has one electron.
Hydrogen never has neutrons.
Responses
Very few atoms of hydrogen contain neutrons.
Very few atoms of hydrogen contain neutrons.
Hydrogen is stable with two protons in its outer energy level.
Hydrogen is stable with two protons in its outer energy level.
Hydrogen only has one electron.
Hydrogen only has one electron.
Hydrogen never has neutrons.
Answers
GPT-4o mini
The response that best explains why hydrogen's atomic number and average atomic mass are very close to the same is:
**Very few atoms of hydrogen contain neutrons.**
This is because hydrogen typically has one proton and no neutrons in its most common isotope (protium), which gives it an atomic number of 1 and an average atomic mass very close to 1. Other isotopes of hydrogen (like deuterium and tritium) do contain neutrons, but their abundance is much lower, so they do not significantly affect the average atomic mass.
**Very few atoms of hydrogen contain neutrons.**
This is because hydrogen typically has one proton and no neutrons in its most common isotope (protium), which gives it an atomic number of 1 and an average atomic mass very close to 1. Other isotopes of hydrogen (like deuterium and tritium) do contain neutrons, but their abundance is much lower, so they do not significantly affect the average atomic mass.