Hydrogen is the chemicalrelating to substances and how they are made or change element with atomicrelating to atoms or the tiny particles making up matter number 1. It is a light, colorless, odorless gas and is the most abundantpresent in very large amounts; more than enough element in the universe.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-24. AI assessment; not a guarantee of accuracy.
Pronunciation
AI-generated pronunciation audio (OpenAI).
Accent: General American English
IPA: /ˈhaɪdrədʒən/
Easy pronunciation: HY-druh-jun (approximate spelling).
Stress: Primary stress on the first syllable.
Pronunciation for the chemical element, not the combining form or any other sense.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-24. AI assessment; not a guarantee of accuracy.
Hydrogen Meaning
the lightest chemical element and a gas used in science and industry
Part of speech: noun
Definition: the chemical element with atomic number 1; a very light, colorless, odorless gas that is highly flammable
Example: Hydrogen is used in some industrial processes and as a possible fuel source.
Synonyms for this meaning:
- atomic number 1 — Scientific label for the element; not a everyday substitute in normal writing.
- H — Chemical symbol for hydrogen; used in formulas and technical contexts, not as a general synonym.
Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-24. AI assessment; not a guarantee of accuracy.
Hydrogen Synonyms
Similar Meaning
- atomic number 1
- H
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-24. AI assessment; not a guarantee of accuracy.
Common Mistakes
- Using hydrogen as if it means helium or another gas.
- Treating H as a normal word synonym in everyday speech instead of a chemical symbol.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-24. AI assessment; not a guarantee of accuracy.
Frequently Asked Questions
What does hydrogen mean?
Hydrogen is the chemical element with atomic number 1. It is the lightest element and a very flammable gas.
What are the synonyms of hydrogen?
The main technical equivalents are atomic number 1 and H, but both are scientific labels rather than everyday substitutes.
Is hydrogen a noun?
Yes. Hydrogen is a noun.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-24. AI assessment; not a guarantee of accuracy.