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Chemistry RQ

Module 3 - Review Questions

3.1 What is the difference between the continuous theory of matter and the discontinuous theory of matter? The continuous theory of matter states that matter can infinitely be divided in half. The discontinuous theory of matter states that matter is, instead, composed of tiny individual particles.
3.2 What two laws were instrumental in the development of Dalton's atomic theory? What law did Dalton predict using his theory? The Law of Definite Proportions and the Law of Mass Conservation. The Law of Multiple Proportions.
3.3 Write the Law of Mass Conservation in your own words. Matter cannot be fabricated or annihilated. It can only alternate configuration.
3.4 List the four assumptions of Dalton's atomic theory. All elements are composed of small, indivisible particles called "atoms." All atoms of the same element have exactly the same properties. Atoms of different elements have different properties. Compounds are formed when atoms are joined together.
3.5 What is the difference between an atom and a molecule? Atom- The smallest chemical unit of matter. Molecule- More than one atom bound together to form a compound.
3.6 What are the physical characteristics that distinguish metals from nonmetals? Metals have superior electric and thermal conductivity, high luster and density, and the ability to be deformed under stress without cleaving. Nonmetals, on the other hand, have little or none of these characteristics.
3.7 How can you determine whether an atom is a metal or a nonmetal from the periodic chart? If it is on the right of the jagged line or if it is hydrogen, it is a nonmetal.
3.8 How can you experimentally determine whether a compound is ionic or covalent? Dissolve the compound in water and see if it conducts electricity.
3.9 How can you determine from the periodic chart whether a compound is ionic or covalent? If a compound contains at least one metal atom and at least one nonmetal atom, the compound is ionic. If a compound is made up of solely nonmetal atoms, the compound is covalent.
3.10 Why do chemists use two different naming systems for compounds? Because some ionic molecules break the rules of the primary naming system.
Created by: LiseBrinkley on 2010-09-28

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