C2.3

Question 1

What is an allotrope?

Answer 1

Allotrope:

• Different forms of an element (different atomic arrangements)
• Diamond and graphene are allotropes of carbon

Question 2

What is an ionic compound?

Answer 2

Ionic compound:

• Metal and non metal bonded by positive and negative ions
• Dissolve in water
• Water molecules pull the Na and Cl ions away when sodium chloride is mixed with water
• Can conduct electricity in liquid form

Question 3

What are characteristics of ionic bonding?

Answer 3

Ionic bonding:

• Giant
• High melting point

Question 4

What are characteristics of covalent bonds?

Answer 4

Covalent bonds:

• Giant
• High melting point (very strong bonds)

Question 5

What are other characteristics of covalent bonds?

Answer 5

Covalent bonds:

• Simple molecular
• Low melting points

Question 6

What are characteristics of metallic bonding?

Answer 6

Metallic bonding:

• Giant
• High melting point

Question 7

How big is a nanoparticle?

Answer 7

Nanoparticle:

• 1-100nm in size