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Questions and Answers
What is the chemical symbol for hydrogen?
What is the chemical symbol for hydrogen?
- He
- N
- H (correct)
- O
What is the most abundant chemical substance in the universe?
What is the most abundant chemical substance in the universe?
- Nitrogen
- Carbon
- Oxygen
- Hydrogen (correct)
When did the formation of protons, the nuclei of hydrogen, occur?
When did the formation of protons, the nuclei of hydrogen, occur?
- During the recombination epoch
- During the first second after the Big Bang (correct)
- About 370,000 years after the Big Bang
- During the emergence of neutral hydrogen atoms
At standard conditions, in what form is hydrogen?
At standard conditions, in what form is hydrogen?
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How many protons does the most common isotope of hydrogen have?
How many protons does the most common isotope of hydrogen have?
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