Covalent bonds

Covalent Bond Worksheet
Name:
Date
                                          SECTION A
Use Ctrl+ B to Highlight the correct responses below for each question.

1. Covalent bonding normally occurs between which types of elements
a) Metals only
b) Non-Metals only
c) Metals and Non-metals
d) All of the above

2. If two atoms of Y could covalently bond together, what type of bond would result?
KEY: Y has 6 electrons in its valence shell
a) Single bond
b) Double bond
c) Triple bond
d) Quadruple bond

3. Covalent bonds are least likely to be formed
a) Between atoms of the same elements
b) Between atoms of different elements on the right of the periodic table
c) Elements with the same ionisation energies
d) Between elements in group 1 and elements in group IV

4. A water molecule is an example of a covalent bond because…
a) A hydrogen gains an electron, the oxygen loses one
b) They do not form neutral groups of atoms
c) Electrons are shared between hydrogen and oxygen
d) Hydrogen and oxygen are neutral ions

5. Which of the elements below will most likely form a covalent bond?
a) Na and Cl
b) Al and Mg
c) H and O
d) Si and Na

6. If two atoms of X combine what type of bond is formed? X has 5 electrons in its valence shell
a) Double
b) Triple
c) Single
d) Quadruple


                                                                           SECTION B
Do all questions in this section

1. Write in the spaces below if the molecules would form single, double or triple bond
a) Chlorine gas Cl2_______
b) Carbon dioxide (CO2) _________
c) Nitrogen gas (N2) __________
d) Methane (CH4) ____________
e) Carbon Monoxide (CO) ____________
f) Iodine Monobromide (IBr) ______________

2. Explain what is meant by octet rule?

3. Use bonding diagrams to show the sharing of electrons for each molecule
a) CO2
b) CH4
c) H2