Section 2-The Periodic Table and Bonding P2

Question 1

Define Electric Current:

Answer 1

Electric current is the flow of electrons or ions

Question 2

Can Ionic Compounds conduct electricity?

Answer 2

• don’t conduct electricity in solid state
• do when the compound is molten or soluble in water(an aqueous solution) due to the ions being able to move when in a liquid

Question 3

What are the three types of chemical bonding?

Answer 3

• Ionic
• Covalent
• Metallic

Question 4

When does metallic bonding occur?

Answer 4

Found only in metals

Question 5

What bonding is found in metals?

Answer 5

Metals have a giant structure of positive ions surrounded by a sea of delocalised electrons
-the electrostatic attraction between the positive ions and the electrons is called metallic bonding

Question 6

What are the properties of metals?

Answer 6

Conductivity
-conduct electricity and heat in a solid state
Melting point
-high(strong force between the delocalised electrons)
Malleability and ductility
-when a force is applied to a metal the layers can slide over each other

Question 7

Define Malleability:

Answer 7

Malleability able to be hammered into different shapes

Question 8

Define Ductility:

Answer 8

Ductility - able to be pulled into a wire

Question 9

Why are metals malleable?

Answer 9

Because of the lattice/layered structure which forms from metallic bonding, the atoms can slide over each other so they can be bent and won’t break

Question 10

Why can metals conduct electricity?

Answer 10

Delocalised electrons can move(and carry current)

Question 11

Why do metals have high melting and boiling points?

Answer 11

There are strong electrostatic attraction between positive and negative ions which takes a lot of energy to break