How Many Electrons Can Bond?

As we said previously, it is very helpful to know the exact electron configuration of each element. You were told that there was additional restriction on the electrons in the shells. The shells are divided into subshells and orbitals. The subshells are called spdfgh, and i. Each subshell has an odd number of orbitals and the electrons in each shell increase in number:

s subshells have 1 orbital 
p subshells have 3 orbitals 
d subshells have 5 orbitals, etc.