Atom Quiz: questions and answers

1. What is an atom?

The smallest constituent unit of ordinary matter

A very small piece of matter and energy

A subatomic particle

2. What is the atom's composition?

Quarks or leptons

Elementary particle

Nucleus and electrons

3. Where is the 99.94% of an atom's mass?

Electrons

Leptons

Nucleus

4. What is the electric charge of neutrons?

Positive

None

Negative

5. What is the most abundant kind of atom?

Nitrogen

Carbon

Hydrogen atoms

6. Where does the word "atom" come from?

The Greek "undivided"

The Greek "element"

Latin "atomic"

7. How are atoms classified?

By the numbers of protons or neutrons

By the quantity of mass

By the year of the discovery

8. Who was the first to publish the theory that all matter is made by atoms?

Robert Boyle

Marie Curie

Isaac Newton

9. What's smaller than an atom?

Subatomic particles

Nothing

Isotopes

10. What makes atoms stick together?

Electric charge

Quantity of mass

Gravity

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