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Chem 1020 Final Exam Study Guide With Complete Solutions
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Chem 1020 Final Exam Study Guide WithComplete Solutions
Matter. CORRECT ANSWERS Any solid, liquid, gas, or plasma that occupies
space and has a mass.
Mixture. CORRECT ANSWERS A combination of two or more substances that
are not chemically combined.
Homogeneous. CORRECT ANSWERS A single-phase combination of solids,
liquids, or gases with a uniform distribution of its constituents throughout the
substance.
Heterogeneous. CORRECT ANSWERS A single-phase combination of solids,
liquids, or gases that are not uniformly distributed throughout the substance.
Solution. CORRECT ANSWERS A homogeneous (of uniform composition)
mixture of a solvent and one or more solutes.
Atom. CORRECT ANSWERS The smallest building block that can exist as a
stable, independent entity.
Element. CORRECT ANSWERS One of the 100 or so pure substances in our
world from which compounds are formed. Elements contain only one type of atom.
Compound. CORRECT ANSWERS A pure substance that is comprised of two or
more different types of atoms in a fixed, characteristic chemical combination.
Molecule. CORRECT ANSWERS Two or more atoms held together by chemical
bonds in a certain spatial arrangement.
Chemical formula. CORRECT ANSWERS A symbolic way to represent the
elementary composition of a substance. It reveals both the elements present (by
chemical symbols) and the atomic ratio of those elements (by the subscripts).
, Molecular compound. CORRECT ANSWERS A pure substance that contains two
or more atoms from nonmetallic elements.
Ionic compound. CORRECT ANSWERS A compound composed of ions that are
present in fixed proportions and arranged in regular, geometric structure.
Allotropes. CORRECT ANSWERS Different structural forms of the same element.
The names of Groups 1 and 2. CORRECT ANSWERS Group 1 - Alkali metals.
Group 2 -Alkaline earth metals.
The names of Groups 17 and 18. CORRECT ANSWERS Group 17 - Halogens.
Group 18 - Noble gases.
What are rare earth metals used for? CORRECT ANSWERS Catalytic converters,
fluorescent lighting, memory chips, rechargeable batteries, magnets, and speakers
inside of cell phones and other portable electronic devices.
Radiation. CORRECT ANSWERS the emission of energy as electromagnetic
waves or as moving subatomic particles.
Wavelength. CORRECT ANSWERS The distance between successive peaks in a
sequence of waves.
Frequency. CORRECT ANSWERS The number of waves passing a fixed point in
one second.
UVA. CORRECT ANSWERS Black light. Reaches Earth's surface in the greatest
quantity and penetrates farthest into the skin. Lowest energy. 320-400 nm.
UVB. CORRECT ANSWERS Most UVB is absorbed by ozone (O3) in the
stratosphere. UVB damages the outermost layer of your skin. Medium energy.
280-320 nm.
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