GIANT AND SIMPLE STRUCTURES

Giant lattice structure held together by attraction between  positive and negatively charged ions 

• simple covalent molecules
• metallic
• ionic
• giant covalent 

Elements such as  Silicon, diamond and graphite.  Compounds include  SiO₂

• simple covalent molecules
• metallic
• ionic
• giant covalent 

Melting points are very high – a large amount of energy is needed to break all the covalent bonds

• simple covalent molecules
• metallic
• ionic
• giant covalent 

Formulae of these might include H₂O
each molecule contains 1 O and 2H atoms 

• simple covalent molecules
• metallic
• ionic
• giant covalent 

Compounds containing a metal and non-metal.

• simple covalent molecules
• metallic
• ionic
• giant covalent 

Which of these is covalent?

• NaCl
• Pb(NO₃)₂
• CO₂
• AlCl₃

Which elements tend to lose electrons?

• metals
• nonmetals

When an atom loses an electron, it becomes a:

• positive ion
• negative ion
• neutral ion
• neutral atom

Atoms form ions in order to become

• isotopes
• stable
• metals
• nonmetals

Why does graphite conduct electricity?

• Ions are free to move to carry the charge

• Atoms can move

• Free electrons that can carry the charge