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Chemical Bonding
Test Description: CYB Chemsitry Test 2 Material
Instructions: Answer all questions to get your test result.
1) The valence shell of a neutral atom loses two electrons. Which of the following ions might result?
A
K+
B
N2-
C
Mg2+
D
O2-
2) Which of the following elements is a nonmetal?
A
Mn
B
Ba
C
Li
D
Se
3) Which type of bond is responsible for atoms of pure gold to be bonded togther?
A
ionic
B
metallic
C
hydrogen
D
covalent
4) Aluminum oxide, Al2O3, is produced by combining Al3+ and O2- particles. What type of compound has been formed?
A
ionic
B
covalent
C
hydrogen
D
metallic
5) How many electrons are shared in a single covalent bond?
A
2 pairs
B
4 pairs
C
3 pairs
D
1 pair
6) How many electrons are shared in a double covalent bond?
A
4 pairs
B
2 pairs
C
3 pairs
D
1 pair
7) How do atoms achieve noble-gas electron configurations in single covalent bonds?
A
Two atoms share one electron.
B
Two atoms share two electrons.
C
One atom completely loses two electrons to the other atom in the bond.
D
Two atoms share two pairs of electrons.
8) Why do atoms share electrons in covalent bonds?
A
to attain a noble-gas electron configuration
B
to become more polar
C
to become ions and attract each other
D
to increase their atomic numbers
9) A molecule with a single covalent bond is _____.
A
CO
B
Cl2
C
N2
D
CO2
10) A diatomic ( 2 atom ) molecule with a triple covalent bond is _____.
A
O2
B
N2
C
F2
D
H2
11) Which of the following diatomic ( 2 atom) molecules is joined by a DOUBLE covalent bond?
A
N2
B
H2
C
Cl2
D
O2
12) Which of the following pairs of elements can be joined by a covalent bond?
A
Mg and C
B
Na and C
C
Li and Cl
D
N and C
13) Which of the following covalent bonds is the most polar? Remember polar means one atom will pull the electrons to its side more. Kind of like tug of war
A
N-N
B
C – C
C
H-Cl
D
C – H
14) Which of the following sets of atoms can be joined by a COVALENT BOND?
A
Mg and Na
B
S and F
C
Na and Cl
D
Be and F
15) An ionic compound is ________.
A
held together by ionic bonds
B
Composed of metals and non-metals
C
composed of anions and cations
D
all of the above
16) What statement is true
A
cations are negative and anions are positive
B
cations are positive and anions are negative
C
cations are neutral and anions are negative
D
cations are positive and anions are neutral
17) What is the total number of covalent bonds normally associated with a single carbon atom in a compound? Translation: how many bonds does carbon make?
A
3
B
2
C
1
D
4
18) Which of the following pairs of elements is most likely to form an ionic compound?
A
magnesium and sodium
B
magnesium and chlorine
C
carbon and fluorine
D
nitrogen and sulfur
19) If the atoms that share electrons have an unequal attraction for the electrons, the bond is called
A
dipolar
B
ionic
C
polar
D
non polar
20) Multiple covalent bonds may occur in atoms that contain carbon, nitrogen, or
A
Oxygen
B
Lithium
C
Helium
D
Hydrogen
*select an answer for all questions
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