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Questions and Answers
What is the chemical symbol for hydrogen?
What is the chemical symbol for hydrogen?
- Hg
- Ho
- H (correct)
- He
At standard conditions, in what state is hydrogen?
At standard conditions, in what state is hydrogen?
- Gas (correct)
- Solid
- Liquid
- Plasma
What is the most abundant chemical substance in the universe?
What is the most abundant chemical substance in the universe?
- Carbon
- Nitrogen
- Hydrogen (correct)
- Oxygen
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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When did the formation of protons, the nuclei of hydrogen, occur in the early universe?
When did the formation of protons, the nuclei of hydrogen, occur in the early universe?
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Study Notes
Hydrogen Overview
- Chemical symbol for hydrogen is H.
- At standard conditions, hydrogen exists as a gas.
- Hydrogen is the most abundant chemical substance in the universe.
Isotope and Composition
- The most common isotope of hydrogen, protium, has one proton.
Cosmic Formation
- The formation of protons and hydrogen nuclei occurred approximately three minutes after the Big Bang during a period known as nucleosynthesis.
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