OCR Chemistry A – Shapes of Molecules (2.2.2 g-h)

How many lone pairs and bonding pairs are in an ammonia molecules?

• 1 bonding pair, 3 lone pairs

• 2 bonding pairs, 2 lone pairs

• 3 bonding pairs, 1 lone pair

• 3 bonding pairs, 0 lone pairs

What shape is an ammonia molecule?

• Tetraheadral

• Trigonal pyramidal

• Trigonal bipyramidal

• Bent

What is the bond angle in an ammonia molecule?

• 109.5^o

• 107^o

• 105.5^o

• 120^o

What shape is a molecule of hydrogen sulphide, SH₂?

What shape is a molecule of carbon dioxide?

What shape is a molecule of XeF₄?

There are three bonding pairs in a molecule of IF₃. How many lone pairs are there?

What is the name of this shape?

What shape is a carbonate ion?

What shape is a sulphate ion, SO₄^2-?