Chemistry Key Concepts

Which of the following are allotropes of Carbon?

• Graphene

• Nanotubes

• Diamonds

• Westminster Fullerene

The diagram to the left is an example of which type of structure?

• Metallic

• Ionic Lattice

• Giant Covalent

• Nanotube

Simple covalent molecules have low melting points as they have weak ______________ forces between the atoms.  

Which of the following shows the empirical formula of the molecule C10H20

• C15H30

• C2H4

• CH2

• C10H10

Mass (g) = Moles x ?

• RFM (Mr)

• RAM

• Molar Mass

• Mass

A covalent bond is a shared paired of _________?

Ionic bonds form between ....

• Metal and non-mental atoms

• Metal atoms

• Non metals

• Positive and negative ions

A compound made from Na+ and Cl- ions is called ... ?

• sodium chloride

• chloride sodium

• chloride sodiumate

• sodium carbonate

Ionic compounds only conduct electricity when ...

• solid

• gaseous

• molten

• fluid

Metallic structures have ___________ electrons.