The Atom Quiz
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5 questions, one answer each
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1. Which of the following correctly describes the basic structure of an atom?
- A. A positively charged nucleus surrounded by negatively charged electrons in orbit
- B. A negatively charged nucleus surrounded by positively charged electrons in orbit
- C. A neutral nucleus surrounded by negatively charged protons in orbit
- D. An electron cloud with a negatively charged nucleus at the centre
2. An atom loses two electrons. What type of ion is formed?
- A. A negative ion with a charge of 2−
- B. A positive ion with a charge of 2+
- C. A negative ion with a charge of 1−
- D. A neutral particle with no charge
3. What evidence does the scattering of alpha particles by thin metal foils provide about atomic structure?
- A. That atoms are solid spheres with no internal structure
- B. That the nucleus is very large and occupies most of the atom's volume
- C. That atoms consist of a small, dense, positively charged nucleus surrounded by mostly empty space
- D. That electrons repel alpha particles more strongly than the nucleus does
4. An atom gains three electrons to form a negative ion. What is the charge of this ion?
- A. 3+
- B. 3−
- C. 1−
- D. 0
5. In Rutherford's alpha particle scattering experiment, most alpha particles passed straight through the metal foil with little or no deflection. What does this observation specifically reveal about atomic structure?
- A. The nucleus contains most of the atom's mass
- B. The atom consists mostly of empty space
- C. The nucleus is negatively charged
- D. Electrons are much heavier than alpha particles