SCMH 1010 EXAM 3: QUESTIONS AND
ANSWERS GRADED A+ 2026
Which of the following represents the most stable arrangement of electrons?
a. atoms with completely filled valence shells
b. elements that are positioned on the far right column of the periodic table of elements
c. inert gases such as helium, neon and argon
d. atoms with a total of 2, 10, 18 or 36 electrons
e. all of the above - ANS e. all of the above
Freezing and boiling are examples of
a. processes that cause physical changes.
b. oxidation/reduction reactions.
c. polymerization.
d. temperature changes that form ionic bonds.
e. processes that cause chemical changes. - ANS a. processes that cause physical changes.
Chemical bonds are
a. the attraction among atoms resulting from the destruction of electrons.
b. an unstable configuration among two or more elements.
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,c. the redistribution of electrons between atoms, leading to a more stable configuration.
d. sharing of electrons in the lowest energy level.
e. explained in laws of thermodynamics. - ANS c. the redistribution of electrons between
atoms, leading to a more stable configuration.
Which of the following common household products is an acid?
a. detergent
b. vinegar
c. milk
d. ammonia
e. salt - ANS b. vinegar
Metallic bonds create materials with properties that make them
a. stiff and viscous.
b. malleable.
c. brittle.
d. good insulators.
e. soft and pliable. - ANS b. malleable.
The electrons at the outer level of the atom are called
a. outer field electrons.
b. the atomic number.
c. valence electrons.
d. van de Waals electrons.
e. ionic electrons. - ANS c. valence electrons.
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,Where would you NOT expect to find plasma?
a. the Sun
b. sealed in a magnetic bottle
c. Pluto
d. neon lights
e. all of the above - ANS c. Pluto
Which state of matter maintains a constant volume but not a fixed shape?
a. gas
b. plasma
c. liquid
d. crystal
e. solid - ANS c. liquid
Examples of polymers are
a. fur and cellulose.
b. spider webs and plastic.
c. nylon and cotton.
d. some paints, inks, and glues.
e. all of the above - ANS e. all of the above
In which of the following places is more polymerization than depolymerization occurring?
a. silk cocoon
b. cow stomach
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, c. compost heap
d. art gallery
e. birdbath - ANS a. silk cocoon
To save money, you bought a tougher cut of meat. Which of the following processes will you be
using if you use a meat tenderizer?
a. distillation
b. condensation reaction
c. precipitation
d. dehydration synthesis
e. depolymerization - ANS e. depolymerization
Sodium chloride (NaCl) atoms form a crystal lattice that is held together by
a. hydrogen bonds.
b. salt bonds.
c. covalent bonds.
d. ionic bonds.
e. van der Waals bonds. - ANS d. ionic bonds.
Which of the following chemical reactions shows combustion?
a. Fe+2 + H2O FeO + H2(g)
b. HCl + NaOH NaCl + H2O
c. CH4 + 2O2 .CO2 + 2H2O
d. Pb + PbO2 + 2H2SO4 2PbSO4 + 2H2O.
e. CaO + 2HCl CaCl2 + H2O - ANS c. CH4 + 2O2 .CO2 + 2H2O
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ANSWERS GRADED A+ 2026
Which of the following represents the most stable arrangement of electrons?
a. atoms with completely filled valence shells
b. elements that are positioned on the far right column of the periodic table of elements
c. inert gases such as helium, neon and argon
d. atoms with a total of 2, 10, 18 or 36 electrons
e. all of the above - ANS e. all of the above
Freezing and boiling are examples of
a. processes that cause physical changes.
b. oxidation/reduction reactions.
c. polymerization.
d. temperature changes that form ionic bonds.
e. processes that cause chemical changes. - ANS a. processes that cause physical changes.
Chemical bonds are
a. the attraction among atoms resulting from the destruction of electrons.
b. an unstable configuration among two or more elements.
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1
,c. the redistribution of electrons between atoms, leading to a more stable configuration.
d. sharing of electrons in the lowest energy level.
e. explained in laws of thermodynamics. - ANS c. the redistribution of electrons between
atoms, leading to a more stable configuration.
Which of the following common household products is an acid?
a. detergent
b. vinegar
c. milk
d. ammonia
e. salt - ANS b. vinegar
Metallic bonds create materials with properties that make them
a. stiff and viscous.
b. malleable.
c. brittle.
d. good insulators.
e. soft and pliable. - ANS b. malleable.
The electrons at the outer level of the atom are called
a. outer field electrons.
b. the atomic number.
c. valence electrons.
d. van de Waals electrons.
e. ionic electrons. - ANS c. valence electrons.
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2
,Where would you NOT expect to find plasma?
a. the Sun
b. sealed in a magnetic bottle
c. Pluto
d. neon lights
e. all of the above - ANS c. Pluto
Which state of matter maintains a constant volume but not a fixed shape?
a. gas
b. plasma
c. liquid
d. crystal
e. solid - ANS c. liquid
Examples of polymers are
a. fur and cellulose.
b. spider webs and plastic.
c. nylon and cotton.
d. some paints, inks, and glues.
e. all of the above - ANS e. all of the above
In which of the following places is more polymerization than depolymerization occurring?
a. silk cocoon
b. cow stomach
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3
, c. compost heap
d. art gallery
e. birdbath - ANS a. silk cocoon
To save money, you bought a tougher cut of meat. Which of the following processes will you be
using if you use a meat tenderizer?
a. distillation
b. condensation reaction
c. precipitation
d. dehydration synthesis
e. depolymerization - ANS e. depolymerization
Sodium chloride (NaCl) atoms form a crystal lattice that is held together by
a. hydrogen bonds.
b. salt bonds.
c. covalent bonds.
d. ionic bonds.
e. van der Waals bonds. - ANS d. ionic bonds.
Which of the following chemical reactions shows combustion?
a. Fe+2 + H2O FeO + H2(g)
b. HCl + NaOH NaCl + H2O
c. CH4 + 2O2 .CO2 + 2H2O
d. Pb + PbO2 + 2H2SO4 2PbSO4 + 2H2O.
e. CaO + 2HCl CaCl2 + H2O - ANS c. CH4 + 2O2 .CO2 + 2H2O
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