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Chemical Bonding
Review
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Chemical Bonding Review
Question 1: Why do elements
form chemical bonds.
Chemical Bonding Review
Answer 1: Elements form bonds
in order to have 8 valence
electrons like the noble gases
Chemical Bonding Review
Question 2: What types of bonds
are found in KClO3?
Chemical Bonding Review
Answer 2: KClO3 contains both
ionic and covalent bonds.
Why? The ionic bond occurs
between the positive K+ ion and
the negative ClO3- ion. The ClO3ion is held together with covalent
bonds.
Chemical Bonding Review
Question 3: Describe the
mechanism of ionic bonding.
Chemical Bonding Review
Answer 3: Ionic bonding occurs
when a metal transfers electrons
to a nonmetal.
Chemical Bonding Review
Question 4: Which set of atoms
would likely form polar
covalent bonds: a) sodium and
chlorine, b) oxygen and
hydrogen, c) hydrogen and
hydrogen, or d) chlorine and
chlorine?
Chemical Bonding Review
Answer 4: Choice b - oxygen
and hydrogen would most likely
form polar covalent bonds.
Chemical Bonding Review
Question 5:Describe the
mechanism of covalent bonding.
Chemical Bonding Review
Answer 5: Covalent bonding
occurs when 2 nonmetals share
electrons.
Chemical Bonding Review
Question 6: Which molecule
would be nonpolar? a) NaCl,
b)CF4, c)H2O, or d) NH3
Chemical Bonding Review
Answer 6: Choice b - CF4 would
be a nonpolar molecule.
Chemical Bonding Review
Question 7: Which molecule
contains polar covalent bonds?
a) O2, b) CH4, C) Li2O, d) CO
Chemical Bonding Review
Answer 7: Choice d- CO would
contain polar covalent bonds
Chemical Bonding Review
Question 8: The
electronegativity difference
between phosphorus and
nitrogen is 0.8. What type of
bond would phosphorus and
nitrogen form?
Chemical Bonding Review
Answer 8: Phosphorus and
nitrogen would form a polar
covalent bond.
Chemical Bonding Review
Question 9: Which molecule
would not be linear? a) O2,
b)CO2, c) OF2, or d)HF
Chemical Bonding Review
Answer 9: Choice c - OF2 would
not be linear.
Chemical Bonding Review
Question 10: Which molecule
would be a trigonal pyramid?
a) H2O
d)NH3
b) SO42-
c)SO3
Chemical Bonding Review
Answer 10: Choice d – NH3
would be a trigonal pyramid.
Chemical Bonding Review
Question 11: What type of
chemical bonds are found in
PCl3?
Chemical Bonding Review
Answer 11: PCl3 contains only
covalent bonds.
Chemical Bonding Review
Question 12: The
electronegativity difference
between Br and Cs is 2.1, what
type of bond would these
elements form?
Chemical Bonding Review
Answer 12: Cs and Br would
form an ionic bond.
Chemical Bonding Review
Question 13: What is the shape
of an F2 molecule?
Chemical Bonding Review
Answer 13: F2 forms a linear
molecule.
Chemical Bonding Review
Question 14: Which molecule
will likely contain polar bonds?
a) H2 b) CH4 c) SO3 d) C2H2
Chemical Bonding Review
Answer 14: Choice c- SO3
contains polar bonds
Chemical Bonding Review
Question 15: Which compound
contains both ionic and covalent
bonds?
a) Cu2O b) Ca(NO2)2 c) CCl4
d) H2O
Chemical Bonding Review
Answer 15: Choice b- Ca(NO2)2
has both ionic and covalent
bonds
Chemical Bonding Review
Question 16: Which molecule
contains polar bonds but is
nonpolar overall?
a) CF4 b) HCl c) O3 d) SO32-
Chemical Bonding Review
Answer 16: Choice a- CF4 is
nonpolar even though it has polar
bonds
Chemical Bonding Review
Question 17: Which molecule
contains nonpolar bonds but is
polar overall?
a) H2O b) HCl c) O3 d) SO32-
Chemical Bonding Review
Answer 17: Choice c- O3 is
polar even though it contains
nonpolar bonds.
Chemical Bonding Review
Question 18: Which molecule
will be tetrahedal? a) SO32b) CH4 c) SO3 d) C2H2
Chemical Bonding Review
Answer 17: Choice b- CH4 is
tetrahedral
Chemical Bonding Review
Question 18: Which set of atoms
would likely form a molecular
(covalent) compound: a)
sodium and chlorine, b)
oxygen and lithium, c)
hydrogen and oxygen, or d)
chlorine and calcium?
Chemical Bonding Review
Answer 18: Choice c - oxygen
and hydrogen would most likely
form a molecular (covalent)
compound.
Chemical Bonding Review
Question 19: Identify the shape
of the nitrate ion.
NO3-
Chemical Bonding Review
Answer 19: The nitrate ion has a
trigonal planar shape.
Chemical Bonding Review
Question 20: Which compound
would be likely to have a high
boiling point: a) H2O, b) CH3Cl,
c) FeCl3, or d) NH3?
Chemical Bonding Review
Answer 20: Choice c- FeCl3
would most likely have a high
boiling point.
Chemical Bonding Review
Question 21: How many possible
resonance structures does the
nitrate ion have?
NO3-
Chemical Bonding Review
Answer 21: The nitrate ion has 3
possible resonance structures.
Chemical Bonding Review
Question 22: Which compound
would be ionic? a) NaCl, b)CF4,
c)H2O, or d) NH3
Chemical Bonding Review
Answer 22: Choice a - NaCl
would be a ionic.
Chemical Bonding Review
Question 23: Name 3 properties
of ionic compounds.
Chemical Bonding Review
Answer 23: Ionic compounds have
the following properties: they are
made of metals and nonmetals; they
have high melting/boiling points; they
are solid state at room temperature;
they are brittle solids; they are good
conductors electricity when melted or
dissolved in water.