Hydrogen

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/hydrogen

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. How heavy is Hydrogen?Approximately 1.008 atomic mass units
2. What is the element symbol?H
3. What is the cosmic abundance?Constitutes about 75% of the universe's normal matter
4. What is hydrogen and why is it important in the universe?Hydrogen is the lightest element, made of one proton and one electron. It makes up about 75% of the visible matter in the universe, so it is very common and important.
5. How does hydrogen help stars shine?In stars, hydrogen atoms fuse together to form helium. This fusion releases a huge amount of energy that makes stars glow.

Isotope: Atoms of the same element with different numbers of neutrons; protium, deuterium, and tritium are hydrogen isotopes.
Baryonic Matter: The ordinary matter in the universe composed of protons and neutrons.
Quantum Mechanics: A fundamental theory in physics describing nature at the smallest scales of energy and matter.
Nucleosynthesis: The process by which new atomic nuclei are created from pre-existing nucleons (protons and neutrons).