1. Ch 8 Review Qwizdom
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2. Please make your selection
If a bonding pair of electrons is unequally shared between two atoms, the bond is
a. ionic.
b. polar covalent.
c. coordinate covalent.
d. nonpolar covalent.

3. Please make your selection
Name the following: CCl4
Dicarbon tetriodide
Tetracarbon iodide
Carbon carbon iodide
Carbon tetrachloride

4. Please make your selection
Which one of the following compounds is not covalent?
a. SCl2
b. HCl
c. KCl
d. S2Cl2

5. Please make your selection
The chemical formula for ammonia is NH3. What type of formula is that?
Molecular formula
Structural formula
Electron dot model
Lewis structure

6. Please make your selection
In Cl2, what is the total number of unshared pairs of electrons?
a. 6
b. 4
c. 2
d. 1

7. Please make your selection
A diatomic molecule with a triple covalent bond is
a. N2
b. H2
c. Br2
d. O2

8. Please make your selection
Atoms are __________ when they are combined.
more stable
less stable

9. Please make your selection
Which of these elements does not exist as a diatomic molecule?
a. I
b. H
c. F
d. He

10. Please make your selection
Name the following: CO2
Carbon dioxide
Dicarbon oxide
Dicarbon dioxide
dicobaltide

11. Please make your selection
Which of these compounds would not have covalent bonds?
a. NO2
b. K2O
c. N2O4
d. H2O2

12. Please make your selection
How many valence electrons does an atom of any halogen have?
a. 1
b. 17
c. 2
d. 7

13. Please make your selection
The carbon tetrachloride molecule is
a. four-cornered.
b. square.
c. tetrahedral.
d. pyramidal.

14. Please make your selection
In forming the molecule HF, the F atom attains the electron configuration of
a. He.
b. Ne.
c. Ar.
d. Cl.

15. Please make your selection
Which of the following molecules has two lone pair of electrons?
a. CH4
b. HCl
c. H2O
d. NH3

16. Please make your selection
How many extra electrons are in the Lewis structure of the sulfate ion, SO42- ? 1 2 3 4

17. Please make your selection
A covalent bond forms…
a. when an element becomes a noble gas.
b. when atoms share electrons.
c. between metals and nonmetals.
d. when electrons are transferred from one atom to another.

18. Please make your selection
The shape of a molecule of NH3 is said to be
a. tetrahedral.
b. bent.
c. pyramidal.
d. linear.

19. Please make your selection
A molecule with a single covalent bond is
CO2.
NO.
F2.
N2.

20. Please make your selection
Atoms share electrons in order to acquire the electron configurations of
a. alkali metals.
b. alkaline earth metals.
c. halogens.
d. noble gases.

21. Please make your selection
What type of bond would be expected in the compound LiF?
a. ionic bond
b. polar covalent bond
c. nonpolar covalent bond
d. none of the above

22. Please make your selection
In the N2 molecule, what is the number of unshared pairs of electrons in each nitrogen atom?
a. 1
b. 3
c. 2
d. 4

23. Please make your selection
Which of the following contains a polar covalent bond?
a. O2
b. MgCl2
c. CaO
d. HF

24. Please make your selection
Which of the following compounds is not ionic?
a. CO2
b. CaCl2
c. NaI
d. Na2O