C2.3 Flashcards
1
Q
What is an allotrope?
A
Allotrope:
- Different forms of an element (different atomic arrangements)
- Diamond and graphene are allotropes of carbon
2
Q
What is an ionic compound?
A
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
3
Q
What are characteristics of ionic bonding?
A
Ionic bonding:
- Giant
- High melting point
4
Q
What are characteristics of covalent bonds?
A
Covalent bonds:
- Giant
- High melting point (very strong bonds)
5
Q
What are other characteristics of covalent bonds?
A
Covalent bonds:
- Simple molecular
- Low melting points
6
Q
What are characteristics of metallic bonding?
A
Metallic bonding:
- Giant
- High melting point
7
Q
How big is a nanoparticle?
A
Nanoparticle:
- 1-100nm in size
