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18 Cards in this Set
- Front
- Back
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Give the law of constant composition.
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In a compound, the relative numbers and kinds of atoms are the same.
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What properties of a substance can be measured without changing the composition or identity of the substance ?
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Physical properties.
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What properties of substance describes the way that it will react with other substances ?
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Chemical properties.
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What is the difference between extensive and intensive properties ?
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1. Extensive- Depends on quantity of substance
2. Intensive- Does not depend on quantity of substance |
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What property of a substance changes when it changes its physical state ?
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Its physical properties.
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Define density.
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Mass/ Volume.
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Describe the law of conservation of matter.
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The total mass before a chemical reaction is equal to the total mass after a chemical reaction.
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Describe the law of multiple proportions.
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If two elements form more than one compound between them, then the ratios of the masses of the second element which combine with a fixed mass of the first element will be ratios of small whole numbers.
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What is the value of an electronic charge ?
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1.602 x 10^-19 C.
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What is the term for the number of protons in an element ?
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The atomic number.
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What is the term for the total amount of neutrons plus protons of an element ?
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The mass number.
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What is the term for an elements that is composed of the same amount of atomic numbers as usual, but has a different mass number ?
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Isotopes.
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What is the formula called of a compound that expresses only the relative amounts of atoms ?
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The empirical formula.
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What is a positive ion called ?
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Cation.
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What is a negative ion called ?
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Anion.
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What is a ionic compound ?
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A compound that contains both cations and anions.
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Of which group of elements are ionic compounds comprised of ?
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Non-metals AND metals.
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Of which group of elements are molecular compounds comprised of ?
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ONLY non-metals.
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