What is the shape of an ammonia molecule?
I just wanted to ask what is the shape of a molecule of ammonia ; I thought it was a trigonal pyramid because it has 3 bonding pairs and 1 lone pair. However I came across this question which I have attached an image of and In the options to answer the question trigonal pyramid is not present. So I just wanted to ask if there is more then one name for trigonal pyramid or if I have just worked it out wrong.
(ii) * What is the shape of the ammonia molecule, NH3?
(1)
* A * pyramidal
* B * tetrahedral
* C * trigonal planar
* D * V-shaped
(ii) * What is the shape of the ammonia molecule, NH3?
(1)
* A * pyramidal
* B * tetrahedral
* C * trigonal planar
* D * V-shaped
Original post by mathieua0001
I just wanted to ask what is the shape of a molecule of ammonia ; I thought it was a trigonal pyramid because it has 3 bonding pairs and 1 lone pair. However I came across this question which I have attached an image of and In the options to answer the question trigonal pyramid is not present. So I just wanted to ask if there is more then one name for trigonal pyramid or if I have just worked it out wrong.
(ii) * What is the shape of the ammonia molecule, NH3?
(1)
* A * pyramidal
* B * tetrahedral
* C * trigonal planar
* D * V-shaped
(ii) * What is the shape of the ammonia molecule, NH3?
(1)
* A * pyramidal
* B * tetrahedral
* C * trigonal planar
* D * V-shaped
From the options above it would be 'pyramidal', you said yourself you thought it was pyramidal, the option just doesn't say 'trigonal' (but implies it)
Original post by emma963
trigonal pyramidal
trigonal planar would be for 3 bonding pairs and no lone pairs (120 degrees)
ammonia has 3 bond pairs and 1 lone pair making the angle 107 (109.5-2.5)
trigonal planar would be for 3 bonding pairs and no lone pairs (120 degrees)
ammonia has 3 bond pairs and 1 lone pair making the angle 107 (109.5-2.5)
There are several types of pyramid.
trigonal pyramid
square pyramid
pentagonal pyramid
but all are sub-sets of the "pyramid" group
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