# Why does a substance such as methane have 4 sp3 orbitals rather than 3 orbitals [closed]

I have been learning about SP3 hybridisation and slightly confused why it it results in 4 sp3 orbitals.

My understanding is this...

The S orbital is spherical and uniform whilst the p orbitals are made of 2 lobes.

There are 3 p orbitals Px Py and Pz.

So if each of these p orbitals combines respectively with the s orbital you end up with 3 new ones. Where does the remaining orbital come from?

Thanks very much,

Daniel

• It would be quite wrong to say that each sp3 orbital comes from specific p orbital. Instead, they are all mixed together. – Ivan Neretin Dec 2 '19 at 15:26
• The number of atomic orbitals equals the number of (hybrid) molecular orbitals. – user55119 Dec 2 '19 at 16:40