Molecule Definition
A molecule is two or more atoms bonded together. For example, a water molecule (H2O) is two hydrogen atoms bonded to one oxygen atom.
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Atoms & Molecules
Fun Facts
- An ammonia molecule is made of one nitrogen atom and three hydrogen atoms.
- A molecule of sucrose consists of 12 carbon, 22 hydrogen, and 11 oxygen atoms.
- A molecule is the smallest particle of a substance with all the properties of the substance.
Why Do We Need To Know About Molecule
Learning about molecules helps us understand the basics of life. Molecules are key in making new medicines and knowing how our bodies work.
For example, scientists make molecules like insulin to help people with diabetes. Also, researching molecules leads to new ways to fight diseases, like cancer.
Frequently Asked Questions
Check out the Full Lesson on Atoms & Molecules
In this lesson, we learn that:
- Everything around us is made of atoms and molecules.
- An atom is the basic unit of an element. It consists of protons, neutrons and electrons.
- Atoms can combine to form molecules as simple as water or as complex as DNA.
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