Calderglen High School
Chemistry Homework 1 – Bonding
1.
Natural gas is made up mainly of methane molecules.
What holds the atoms together in a methane molecule?
2.
Why do atoms form bonds?
3.
Explain why a noble gas does not form a bond.
4.
Circle the correct word to complete the sentence.
non metal
In a covalent compound
atoms join together.
metal
5.
Circle the correct words to complete the sentence.
In an ionic compound a
non metal
joins with a
metal
6.
non metal
metal
Copy and complete the table to show the type of compound for each substance.
Name of Substance
Type of Substance
(Covalent /Ionic)
carbon dioxide
sodium chloride
copper chloride
water (H2O)
7.
.
Oxygen gas exists as diatomic molecules.
(a)
What does the term diatomic mean?
(b)
Name six other elements which exist as diatomic molecules.
Calderglen High School
Chemistry Homework 1 – Bonding
8.
9.
The names of some elements are shown.
(a)
Identify the elements with symbol Na.
(b)
Identify the two elements which react together to form a covalent compound.
The grid shows the formula for some compounds.
Identify the two compounds that exist as molecules.
10.
Which of the following is a diatomic molecule; CO2 or CO. Explain your choice.
11.
Different terms can be used to indicate the number of atoms in a molecule.
Identify the term used to describe the following molecule.
Calderglen High School
Chemistry Homework 1 – Bonding