Atomic Structure Quiz
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5 questions, one answer each
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1. What is the approximate radius of an atom?
- A. 10⁻¹⁵ m
- B. 10⁻¹⁰ m
- C. 10⁻⁵ m
- D. 10⁻¹ m
2. What is the relative charge of a neutron?
- A. +1
- B. −1
- C. 0
- D. +2
3. An atom has 8 protons and 10 neutrons. What is its mass number?
- A. 8
- B. 10
- C. 18
- D. 2
4. What does the alpha particle scattering experiment show about the atom?
- A. Atoms have no mass
- B. Atoms are entirely solid throughout
- C. Atoms are mostly empty space with a small, dense, positively charged nucleus
- D. Electrons are found in the nucleus
5. An atom of sodium has 11 protons and 11 electrons. It loses one electron. What does it become?
- A. A negative ion, because it has more electrons than protons
- B. A positive ion, because it now has more protons than electrons
- C. A neutral atom, since it still has 11 protons
- D. An isotope of sodium