Name:_____________________________ Date:__________
Hour:______ Assignment #_____
ALL ABOUT COVALENT BONDING
1. What is a covalent bond?
2. Why do atoms create covalent bonds with other atoms?
3. When atoms create covalent bonds with other atoms, what is the maximum number of valence
electrons they can have (except hydrogen)?__________
4. Ionic bonds are created between a metal and a non-metal while covalent bonds are created between
two _____________________.
5. When two of the same atoms create covalent bonds, they are called ___________________
molecules.
6. List the 7 diatomic elements. ______________________________________________________
7. A double bond involves ___________ pairs of electrons.
8. N2 is an example of a compound with a _______________ bond. (single, double, or triple)
9. Which of the formulas represent the correct molecule if X and Z were
to create a bond?
A) XZ
B) X3Z
C) XZ3
D) X2Z
10. The attraction to electrons that elements have is known as _______________________________.
11. Explain polar covalent molecules (what gives them polarity).
12. Oxygen’s atomic number is ______, it will have ______ valence electrons and it wants to bond to
______ more electrons to fill the energy level.
13. Hydrogen’s atomic number is _______, so it will have ______ valence electrons, and wants to bond
to ______ more electron to fill the energy level.
14. Draw a lewis dot diagram to show how 4 Hydrogens bond to one Carbon creating CH4. Draw
circles to show shared electrons.
15. Draw a lewis dot diagram to show how 3 Hydrogens bond to one Nitrogen creating NH3. Draw
circles to show shared electrons.
Use the following diagrams to answer questions 16-21
A)
B)
C)
16. Which diagram above shows only single bonds?______
17. Which diagram above shows a double bond?_______
18. Which diagram above shows a triple bond?_______
19. How many total electrons are shared between oxygen and carbon in diagram A?______
20. How many pairs of electrons are shared between carbon and carbon in diagram B?______
21. How many pairs electrons are shared between carbon and hydrogen in diagram C?_______
22. List the prefixes used in naming covalent compounds:
Number of atoms
1
Prefix
Number of atoms
6
Prefix
2
7
3
8
4
9
nona
5
10
deca
23. State whether the following compounds are ionic or covalent.
Compound
Ionic or Covalent?
Compound
HgBr
Disulfur Trioxide
SO3
Nickel (II) cyanide
P2O5
Chlorine Tetrafluoride
KCl
Tin (IV)Bromide
Ba(NO3)2
H2O
Lead (II) Phosphate
NaCl
Ionic or Covalent?
Name the following covalent compounds:
24. NO2 ______________________________________________________
25. CO _____________________________________________________
26. S3Cl5
_______________________________________________________________________________
27. S8O5____________________________________________________________________________________
28. Br2I_________________________________________________________
29. SiF4_____________________________________________________________________________________
Write the formula for the following covalent compounds:
30. Phosphorus trichloride
_________________
31. Phosphorus monoxide
_________________
32. Disilicon tetrachloride
_________________
33. Trinitrogen hexafluoride _________________
34. Pentabromine heptachloride
________________
35. Diphosphorus pentoxide
__________________
Matching- match each formula on the right to its correct name on the left.
_____36. disulfur tetrafluoride
a) H3P
_____37. carbon trioxide
b) CH4
_____38. nitrogen pentoxide
c) HCl
_____39. nitrogen tribromide
d) H2O
_____40. dinitrogen heptachloride
e) NBr3
_____41. carbon tetrachloride
f) NH3
_____42. hydrogen monochloride
g) N2Cl7
_____43. trihydrogen monophosphide
h) S2F4
_____44. water
i) NO5
_____45. methane
j) CO3
_____46. ammonia
k) CCl4
47-50 on back
For numbers 47-50, use the table and information below to tell whether each bond between atoms
is polar, or nonpolar.
ELECTRONEGATIVITY VALUES OF THE ELEMENTS
Difference of 0.0 to 0.5 = nonpolar
47) carbon + sulfur
Difference of 0.6 to 1.6 = polar
_________________
48) oxygen + chlorine __________________
49) nitrogen + hydrogen ___________________
50) sulfur + fluorine _______________________