Chemcial Bonding

Question 1

What is a molecule?

Answer 1

A molecule is a group of atoms joined together. It is the smallest particle of an element or compound that can exist independently

Question 2

What is the Octet Rule?

Answer 2

When bonding occurs, atoms try to have eight electrons in the outer orbit

Question 3

What is a covalent bond and an example of one?

Answer 3

A bond that consists of shared electrons

Methane

Question 4

What is a single bond?

Answer 4

A single bond is formed when one pair of electrons is shared

Question 5

What is a double bond?

Answer 5

A double bond is formed when two pairs of electrons are shared

Question 6

What is an ion?

Answer 6

An ion is a charged atom or group of atoms

Question 7

What is an ionic bond and an example of one?

Answer 7

An ionic bond is the force of attraction between positive and negative ions in a compound

Sodium chloride (Na-Cl+)

Question 8

Give 5 properties of ionic compounds

Answer 8

Consist of positive and negative ions

Usually solid at room temperature

Usually high melting and boiling points

Usually soluble in water

Conduct electricity when melted or when dissolved in water

Question 9

Give 5 properties of covalent compounds

Answer 9

Usually consist of individual molecules

Usually liquid or gas at room temperature

Usually low melting points

Usually insoluble in water

Do not conduct electricity

Question 10

How do you investigate the ability of ionic and covalent substances to conduct electricity?

Answer 10

1. Set up a circuit with a switch from a battery to a carbon electrode in a solutions and then from another carbon electrode in the solution to a bulb and back to the battery.
2. Test different substances such as copper sulfate, methylated spirits and sodium chloride.
3. The solutions that contain ions conduct electricity