Structure And Bonding

Question 0

Why does an ionic bond have high melting points?

Answer 0

There’s a strong force of attraction between oppositely charged ions.
Need lots of energy to break bonds.
Known as hard crystalline solids

Question 1

What is ionic bond?

Answer 1

The attraction between oppositely charged ions

Question 2

Describe the conductivity in an ionic bond

Answer 2

Ionic solid will not conduct as particles are in fixed positions.
Do conduct when molten/dissolved as ions are free to move

Question 3

What must a chemical have in order to conduct electricity?

Answer 3

Freely moving charged particles

Question 4

Give an example of ionic bonding- also known as giant ionic structure

Answer 4

Sodium chloride: NaCl

Question 5

What is the other name of covalent bonding?

Answer 5

Simple molecule

Question 6

The particles involved in covalent are…

Answer 6

Simple molecules

Question 7

What is the melting point of covalent?

Answer 7

Low due to the weak intermolecular forces the are broken (e.g VDW)

Question 8

Can covalent a conduct?

Answer 8

Do no conduct as they do not have charges

Uncharged molecules

Question 9

What is covalent bonding?

Answer 9

Shared pair of electrons

Question 10

Why does ice float in water?

Answer 10

When ice melts the H bonding breaks. The particles are further apart and so ice is less dense- making it float

Question 11

Examples of covalent

Answer 11

Ice

Iodine

Question 12

What is a metallic bond?

Answer 12

The attraction between the positive nuclei of the metal ions and the delocalised electrons.

Question 13

What are the particles involved in metallic?

Answer 13

Metal ions with electrons surrounding it

Question 14

What is the melting point like in metallic?

Answer 14

High, but not like ionic, due to strong electrostatic attraction between the delocalised electron and the positive nuclei

Question 15

Can conductivity happen in metallic bonding?

Answer 15

Yes because of the sea of delocalised electrons being able to move freely

Question 16

Give example of metallic

Answer 16

Mg from group 2

Question 17

Give one other property of metallic bonding

Answer 17

Malleable as layers of ions can slide over each other

Question 18

What is a giant covalent also known as?

Answer 18

Macro molecular

Question 19

What is a giant covalent?

Answer 19

Macromolecules are many atoms that are covalently bonded together to make a giant structure

Question 20

What is the type of particle in macro molecular structure?

Answer 20

Atoms

Question 21

What is the melting point like in macromolecule structure?

Answer 21

Very high due to it being the strongest of all bonds

Question 22

What is the conductivity like in giant covalent?

Answer 22

Generally they don’t conduct but graphite does as it has layers of atoms that enables the charges to move

Question 23

Give examples of macromolecular structure?

Answer 23

Diamond
Graphite
Silicon

Question 24

What are the uses of the examples given?

Answer 24

Graphite is used for pencils; electrodes as it can conduct; lubricants as the layers can slide over. Diamond is used for jewellery; cutting; drilling

Question 25

How many bonds do each of the examples make?

Answer 25

Diamond and silicon makes 4 bonds, which is the maximum amount carbon van bond to. Graphite makes 3 bonds which means electrons can move through layers