Chapter 2: Atoms, Molecules, and Ions 1. The first people to attempt to explain why chemical changes occur were A) alchemists B) metallurgists C) physicians D) physicists E) the Greeks ANS: E PTS: 1 DIF: Easy REF: 2.1 KEY: Chemistry | general chemistry | early atomic theory MSC: Conceptual 2. The Greeks proposed that matter consisted of four fundamental substances: A) fire, earth, water, air B) fire, metal, water, air C) earth, metal, water, air D) atoms, fire, water, air E) atoms, metal, fire, air ANS: A PTS: 1 DIF: Easy REF: 2.1 KEY: Chemistry | general chemistry | early atomic theory MSC: Conceptual 3. The first chemist to perform truly quantitative experiments was A) Paracelsus B) Boyle C) Priestly D) Bauer E) Lavoisier ANS: B PTS: 1 DIF: Easy REF: 2.1 KEY: Chemistry | general chemistry | early atomic theory MSC: Conceptual 4. The scientist who discovered the law of conservation of mass and is also called the father of modern chemistry is A) Proust B) Boyle C) Priestly D) Bauer E) Lavoisier ANS: E PTS: 1 DIF: Easy REF: 2.2 KEY: Chemistry | general chemistry | general concepts | matter | Law of Conservation of Mass MSC: Conceptual 5. Which of the following pairs of compounds can be used to illustrate the law of multiple proportions? A) NH4 and NH4Cl B) ZnO2 and ZnCl2 C) H2O and HCl
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