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19 Cards in this Set
- Front
- Back
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The atomic particle with a negative electrical charge is the:
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electron
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An elements atomic number is always determined by its number of:
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protons
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Isotopes of an element have the same atomic number, but different numbers of:
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neutrons
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An atom that gives away an electron becomes an ion with a charge of
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+1
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How many covalent bonds does an oxygen atom usually form?
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2
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Which type of bond occurs within a water molecule?
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polar covalent
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The ratio of atoms in a carboyhydrate is: one carbon for every two hydrogens and one oxygen. Which type of chemical formula is this?
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empirical
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The pH of a solution is lowered from 6 down to 3. The concentration of H+ is:
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1000 times more
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A substance that slows pH changes is known as a(n):
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buffer
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Which of the following molecules is considered organic?
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methane
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Which of the following functional groups causes a molecule to be nonpolar?
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methyl
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Which functional group is always found in nucleic acids, but not other biological molecules?
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phosphate
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A carbohydrate containing 22 hydrogen atoms is most likely
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sucrose
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what is an isomer of glucose?
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fructose
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Dehydration synthesis NEVER results in the formation of which product?
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monosaccharides
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Which term does NOT refer to a molecule of glucose?
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ketone
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the plant polysaccharide that builds the cell wall is known as
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cellulose
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which statement is true of lipids?
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found in adipose tissue
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The region of fat containing a fatty acid would be
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nonpolar
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