1. Valence electrons are
1.
2.
3.
4.
unpaired electrons
outer-shell electrons
inner-shell electrons
electrons in the nucleus
2. How many valence electrons are in atom of sulfur
(atomic #16)?
1.
2.
3.
4.
5.
6.
7.
8.
eight
one
seven
four
five
two
three
six
3. How many valence electrons are in atom of radon
(atomic #86)?
1.
2.
3.
4.
5.
6.
7.
8.
six
three
two
eight
one
seven
four
five
4. How many valence electrons are in atom of cesium
(atomic #55)?
1.
2.
3.
4.
5.
6.
7.
8.
four
six
five
three
seven
two
one
eight
5. How many valence electrons are in atom of carbon
(atomic #6)?
1.
2.
3.
4.
5.
6.
7.
8.
six
three
one
two
four
eight
seven
five
6. How many valence electrons are in atom of aluminum
(atomic #13)?
1.
2.
3.
4.
5.
6.
7.
8.
two
six
three
one
seven
eight
four
five
7. How many valence electrons are in atom of arsenic
(atomic #33)?
1.
2.
3.
4.
5.
6.
7.
8.
eight
four
two
one
five
six
seven
three
8. How many valence electrons are in atom of iodine
(atomic #53)?
1.
2.
3.
4.
5.
6.
7.
8.
one
three
four
seven
two
eight
six
five
9. How many electrons will a calcium atom (Ca) lose in
order to get a noble gas configuration?
1.
2.
3.
4.
one
two
four
three
10. How many electrons will a phosphorus atom (P)
gain in order to get a noble gas configuration?
1.
2.
3.
4.
two
three
four
one
11. What is the formula for the ion formed when
strontium (atomic number 38) loses its valence
electrons?
1.
2.
3.
4.
2+
Sr
Sr+
SrSr2-
17. Which of the following is the correct compound
formula for sodium oxide?
1.
2.
3.
4.
NaO2
Na2O3
NaO
Na2O
18. Chemical bonds may be produced by any of the
following processes involving electrons EXCEPT:
12. What is the formula for the ion formed when oxygen
(atomic number 8) obtains a noble gas configuration?
1.
2.
3.
4.
O+
O3O2O2+
13. Which of the following if the correct compound
formula for barium sulfide?
1.
2.
3.
4.
Ba3S2
BaS
Ba2S
BaS2
14. Which of the following if the correct compound
formula for iron(II) phosphide?
1.
2.
3.
4.
FeP
Fe2P3
Fe2P
Fe3P2
15. Which of the following if the correct compound
formula for lithium fluoride?
1.
2.
3.
4.
LiF3
LiF2
Li2F
LiF
16. Which of the following if the correct compound
formula for aluminum chloride?
1.
2.
3.
4.
sharing electrons
losing electrons
gaining electrons
splitting electrons
19. In ionic bonds, valence electrons are:
1.
2.
3.
4.
equally shared
unequally shared
destroyed
transferred
20. In metallic bonding, the valence electrons of all
atoms are shared in:
1.
2.
3.
4.
transferred to nonmetallic ions
a nonpolar covalent bond
an electron sea
a polar covalent bond
21. Bonds between atoms of metals are generally:
1.
2.
3.
Ionic
Metallic
Covalent
22. Bonds between nonmetals and other nonmetals are
generally:
1.
2.
3.
Metallic
Ionic
Covalent
23. Bonds between metals and nonmetals are generally:
1.
2.
3.
4.
AlCl
AlCl3
AlCl2
Al2Cl3
1.
2.
3.
Metallic
Covalent
Ionic
24. A bond between nitrogen (atomic #7) and oxygen
(atomic #8) would be:
1.
2.
3.
ionic
covalent
metallic
32. The correct electron-dot notation for the element
indium (atomic #49) is:
1.
2.
25. The bond between boron (atomic #5) and silicon
(atomic #14) is:
1.
2.
3.
ionic
covalent
metallic
26. The bond in between sodium (atomic #11) and
oxygen (atomic #8) is:
1.
2.
3.
metallic
covalent
ionic
27. The bond between hydrogen (atomic #1) and oxygen
(atomic #8) is:
1.
2.
3.
ionic
covalent
metallic
28. The bond between lithium (atomic #3) and fluorine
(atomic #9) is:
1.
2.
3.
ionic
metallic
covalent
29. A bond between potassium (atomic #19) and
chlorine (atomic #17) would be:
1.
2.
3.
covalent
metallic
ionic
30. The bond in between an oxygen atom and another
oxygen atom is:
1.
2.
3.
ionic
covalent
metallic
31. The bond existing between the atoms of iron (atomic
#26) in a piece of iron is:
1.
2.
3.
metallic
covalent
ionic
3.
4.
33. Which of the following IS NOT a covalent
compound?
1.
2.
3.
4.
CaO
CO2
CH3Cl
NH3
34. Which of the following IS NOT an ionic compound?
1.
2.
3.
4.
KCl
C2H5OH
MnO2
Mg3N2
35. The octet rule explains the stability of most
covalently bonded molecules in terms of:
1.
2.
3.
4.
electronegativity differences
noble-gas configurations
ionization energies
electron affinities
36. According to the HONC rule, how many covalent
bonds form around hydrogen and the halogens?
1.
2.
3.
4.
two
one
four
three
37. According to the HONC rule, how many covalent
bonds form around nitrogen?
1.
2.
3.
4.
two
three
one
four
38. Which of the following is an acceptable Lewis
Structure for the diatomic nitrogen molecule?
42. Which of the following is an acceptable Lewis
structure for chloromethane (CH3Cl)?
1.
2.
3.
1.
4.
39. Which of the following elements has the same Lewis
dot structure as phosphorus?
1.
2.
3.
4.
argon
silicon
sulfur
nitrogen
2.
40. In the correct Lewis structure for the methane (CH4)
molecule, how many unshared electron pairs surround
the carbon?
1.
2.
3.
4.
2
0
4
8
41. In the correct Lewis structure for water, how many
unshared pairs of electrons will oxygen have?
1.
2.
3.
4.
1
3
2
4
3.
4.
43. Which of the diatomic elements has a double bond
between its atoms?
1.
2.
3.
4.
oxygen
hydrogen
fluorine
nitrogen
44. Most ionic compounds form:
1.
2.
3.
4.
liquids
crystals
gases
molecules