CHEMISTRY TOPIC 2

Question 1

whats an ion

Answer 1

When an atom loses or gains an electron

Question 2

Why doesnt group 3,4,5 form ions easily?

Answer 2

Because it requires too much energy

Question 3

What is an ionic bond

Answer 3

A bond that forms when two oppositely charged ions are attracted and so bond together

Question 4

What is an electrostatic force?

Answer 4

It is a force that attracts oppositely charged ions

Question 5

What is the ionic compound formula for a hydroxide ion?

Answer 5

Hydroxine ion = OH -

Question 6

What is the ionic compound formula for a SULFATE ion?

Answer 6

Sulfate ion = So4 (2-)

Question 7

What is the ionic compound formula for a NITRATE ion?

Answer 7

Nitrate ion = No3 -

Question 8

What is the ionic compound formula for a CARBONATE ion?

Answer 8

CO3 (2-)

Question 9

What is the ionic compound formula for a AMONIUM ion?

Answer 9

Amonium = NH4 +

Question 10

What are the properties of ionic compounds?

Answer 10

High MP and BP
Conducts electricity
High strength bonds / Strong bonds

Question 11

What form do ionic compounds conduct electricity and why

Answer 11

Ionic compounds only conduct electricity in liquid/molten or aqueous form because
the ions move freely and carry a charge

Question 12

How are ionic compounds arranged?

Answer 12

Arranged so that it creates an overall neutral charge

Question 13

What is a covalent bond?

Answer 13

Sharing of electrons between non-metal atoms

Question 14

What is an ionic compound

Answer 14

The electrostatic force of attraction between a positively charged metal ion and a negatively charged non-metal ion.

Question 15

Draw the displayed formula of Ammonia NH3

Question 16

What is a drawback of the 3d model?

Answer 16

Hard to predict its shape

Question 17

MAKE FLASHCARDS ON TYPES OF COVALENT STRUCUTERS

SIMPLE MOELCURLAR

Question 18

What is a simple molecular substance?

Answer 18

Small molecules made of a few covalently bonded atoms

{Seperate molecules are joined together by weak intermolecular forces
such as two chlorine atoms }

Question 19

What are 2 properties of covalent bonds?

Answer 19

Strong

Requires lots of energy to break them

Question 20

What temperature is needed to break the intermolecular forces of simple molecular substances?

Answer 20

Only needs a low temperature to melt or boil as their intermolecular forces are weak

Question 21

What happens to attraction when they are more intermolecular bonds ?

Answer 21

More intermolecular bones the stronger the attraction

Question 22

What properties are discovered when going down group 7

Answer 22

As we go down the group:
The molecules are bigger
so more intermolecular forces
so more energy needed to break them 
MP and BP Increases

Question 23

What are the properties of simple molecular substances?

Answer 23

Doesn’t conduct electricity / because there are no free electrons and the molecules themselves have no electric charge
Normally gas at room temp because of their weak intermolecular forces

Question 24

Describe giant molecular substances

Answer 24

Made of lots of non-metal atoms
All bonded together by Covalent bonds
Arranged in regular lattice structure - [ so are stronger than simples molecular substances and have higher MP & BP]

Question 25

Give some examples of giant covalent structures

Answer 25

Diamond
Graphite
Silicon Dioxide

Question 26

What are the properties of Giant covalent structures?

Answer 26

Strong
High MP & BP because of their strong covalent bonds
Doesn’t conduct electricity as they don’t have any charged particles

Question 27

Can Graphite conduct electricity and why?

Answer 27

Yes, because it only each carbon atom is only bonded to three other atoms
meaning it has 1 free delocalised electron, which can move and carries a charge

Question 28

What is silicon dioxide?

Answer 28

Made of silicon and oxygen

It’s a giant molecular substance