Ch4 Bond Angle

Why are the bond angles different in CH4, NH3 and H2O, they all look tetrahedral?

You are right, if you look at all the electron pairs around the central atom, they are all tetrahedrals. But only CH4 is truly a tetrahedron because it has 4 equal bonding electron pairs, which is the approximate bond angle for a tetrahedron of about 109o.

Nitrogen has only one pair of electrons, this pair has a slight distortion effect on the other 3 pairs of bonds and pushes them together, giving an angle of less than 109 (107), which gives the bond pair a triangular shape. Gives.

Oxygen water has two solitary pairs of electrons that bind the two bond pairs together, resulting in a bond angle of 104.5. The molecule is said to be bent towards the bond pair.

NH3. Occupancy support

H2o connection angle

H2O has only one pair of electrons, which makes it a curved molecule. This is not a Tetra Hadron.

NH3 is a tetrahedral with a triangular pyramidal shape due to the NN pair.

CH4 is a tetrahedral with a bond angle of 109.5.

Ch4 Bond Angle

Why are the bond angles different in CH4, NH3 and H2O, do they all look tetrahedral? 3
please explain
You are right, if you look at all the electron pairs around the central atom, they are all tetrahedral. But only CH4 is truly a tetrahedron because it has 4 pairs of equivalent electron bonds, which makes the expected bond angle around 109o for tetrahedron.
Nitrogen contains only one pair of electrons, this pair has a slight distortion effect on the other 3 pairs of bonds and pushes them, causing the bond angle to be less than 109 (107), which gives only a pair of bonds a triangle. Shapes
In water, there are two single pairs of oxygen that bind the two bond pairs together, resulting in a bond angle of 104.5. The molecule is said to be inclined towards the bond pair.
H2O has only one pair of electrons, which makes it a curved molecule. This is not a tetrahedron.
NH3 N has a triangular pyramid-shaped tetrahedral due to isolated joints.
CH4 is a tetrahedral with a bond angle of 109.5.
Look at single pairs, and then the geometric shapes will be different ...
CH4 tetrahedron
NH3. Test pyramid
H2O ... * bends *
Due to the difference between the partners alone, the bond partner retreats, the angle of bond varies.