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Pre-AP Chemistry Benchmark Review.
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Pre-AP Chemistry Benchmark Review.
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Pre-AP Chemistry Benchmark ReviewAtoms - correct answer-The smallest unit of an element that maintains the chemical identity
of that element.
Elements - correct answer-Pure substances that cannot be broken down into smaller units
and still possess chemical properties. For example: Gold (Au) or Lead (Pb)
Molecules - correct answer-Substances that have one or more atoms and possesses
chemical and physical properties.
Compounds - correct answer-this term refers to a substance made up of two or more
different elements.
Extensive Properties - correct answer-1.These properties depend on the amount of matter in
a specimen.
2.These properties include: volume, mass, amount of energy in a substance.
Intensive Properties - correct answer-1.These properties do not depend on the amount of
matter.
2.These properties include: melting point, boiling point, density, ability to conduct electricity
Percentage Error - correct answer-% Error = (VObserved - VExpected)/ VExpected X 100
Homogenous Mixtures - correct answer-these are mixtures thatappearas uniformin
composition. (" homo" means "same") For example, Kool-aid.
Colloid - correct answer-these are substances that appear uniform, but if left undisturbedwill
separate based upon density. For example, milk.
Heterogenous Mixtures - correct answer-these are mixtures that appearun-uniform in
composition. ("hetero" means "different") For example, a plate of salt and pepper mixed or a
chunk of granite.
Centrifuge - correct answer-separating particles, in a liquid, by differing densities
Chromatography - correct answer-separating solutions by differing densities.
Electrolysis - correct answer-providing electricity to water to convert it to Hydrogen gas and
Oxygen gas.
John Dalton - correct answer-A. the first to propose an "Atomic theory" that contains the 5
following statements:
1. All matter is composed of extremely small particles called "atoms".
2. Atoms of a given element are identical in size, mass, and other properties; atoms of
different elements differ in size, mass, and other properties.
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