Structure A - formula
• they show methane contains carbon and hydrogen
• structure A only shows the ratio of C:H (as 1:4)
• structure A gives no information about bonding in molecule
• structure A gives no information about shape of molecule
Structure B - diagram
• dot & cross diagram, B, shows the covalent bonding between the C and H atoms
• single bonds, show in structures B, C and D
• inner shell not involved in bonding
• structure B does not show the 3-D positions of atoms
Structure C - formula
• single lines used to show single covalent bonds in structure C
• only a 2-D representation and not positions in space
Structure D model,
D, shows position in space / 3-D arrangement
• atoms not actually connected by the sticks
Structure E - model
• shows 3-D arrangement of atoms
• E shows approximate relative sizes occupied by separate atoms
• no information about type of bond between atoms in structure E
Space filling
Displayed
Dot and cross
molecular
ball & stick
