INTRODUCTION TO CHEMICAL BONDING
_____ 1. In a chemical bond, the link
between atoms results from the attraction between electrons and
(A) Lewis structures (B)
nuclei (C) van der
Waals forces (D) isotopes
_____ 2. A covalent bond consists of
(A) a shared
electron
(B) a shared electron pair
(C) two electrovalent
ions (D) an octet of
electrons
_____ 3. If two covalently bonded atoms are
identical, the bond is identified as
(A) nonpolar
covalent (B) polar
covalent (C)
nonionic (D) coordinate covalent
_____ 4. A covalent bond in which there is
an unequal attraction for the shared electrons is
(A) nonpolar
(B) polar (C)
ionic (D) dipolar
_____ 5. Atoms with a strong attraction for
electrons they share with another atom exhibit
(A) zero electronegativity
(B) low electronegativity
(C) high electronegativity
(D) Lewis electronegativity
_____ 6. Bonds with between 5% and 50%
ionic character are considered to be
(A) ionic (B) pure
covalent (C) polar
covalent (D) nonpolar
covalent
_____ 7. A nonpolar
covalent bond is likely to exist between
(A) a metal and a nonmetal (B) two
ions (C) two identical
atoms (D) an atom and an ion
_____ 8. The greater the electronegativity difference between two bonded atoms, the
greater the percentage of
(A) ionic character (B) covalent
character (C) metallic
character (D) electron sharing
_____ 9. In which of these compounds is the
bond between the atoms NOT a nonpolar covalent bond?
(A) Cl2 (B) H2
(C) HCl (D)
O2
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10. The electrons involved in the formation of a chemical bond are called _________________________________.
11. A chemical bond
resulting from electrostatic attraction between positive and negative ions is
called a(n)
_________________________________________.
12. If the electrons
involved in bonding spend most of the time close to one atom rather than the
other, the bond is
_________________________________________.
For questions 13 & 14, refer to the following information.
% Ionic
Character
100%
50%
5% 0%
Difference
in 4.0
1.7
0.3 0.0
Electronegativity
Ionic
Polar
Covalent
Nonpolar
Covalent
13. The difference in electronegativity and the type of bond for the Li-Cl bond in LiCl (electronegativity value for
Li = 1.0; electronegativity value for Cl
= 3.0) are ______________________________________________.
14. The difference in electronegativity and the type of bond for the Br-Br bond
in Br2 (electronegativity value for
Br = 2.8) are _____________________________________________________.