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19 Cards in this Set

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