10 Multiple Choice Questions on Atoms
1. What is the smallest unit of an element that retains its properties?
Molecule
Atom
Ion
Compound
Correct Answer
Wrong Answer
2. What particles make up the nucleus of an atom?
Electrons
Protons and electrons
Protons and neutrons
Neutrons and electrons
Correct Answer
Wrong Answer
3. Which particle orbits the nucleus in an atom?
Proton
Neutron
Electron
Quark
Correct Answer
Wrong Answer
4. What determines the atomic number of an element?
Number of neutrons
Number of protons
Number of electrons
Mass of nucleus
Correct Answer
Wrong Answer
5. Who proposed that atoms are indivisible particles?
Einstein
Democritus
Bohr
Curie
Correct Answer
Wrong Answer
6. Which of these particles are found outside the nucleus?
Neutrons
Protons
Electrons
Quarks
Correct Answer
Wrong Answer
7. What force holds protons and neutrons together in the nucleus?
Gravitational force
Magnetic force
Strong nuclear force
Weak nuclear force
Correct Answer
Wrong Answer
8. The electron clouds around an atom's nucleus represent...
Definite paths of electrons
Probability zones of electrons
Spaces for protons
Paths of neutrons
Correct Answer
Wrong Answer
9. Which discovery showed that atoms are divisible?
Discovery of the neutron
Discovery of electron
Discovery of nucleus
Discovery of photon
Correct Answer
Wrong Answer
10. Who discovered the electron?
Dalton
Thomson
Rutherford
Bohr
Correct Answer
Wrong Answer
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