Orbital: An orbital is a region in space within which there is a high probability of finding an electron
Orbital and orbit are different → orbit travels at a constant velocity at a constant distance from the nucleus
Erwin Schrödinger → devised maths equation to work out the probability of finding an electron in a particular sublevel → gave the dimensions of orbitals
s orbital → spherical
p orbital → dumbbell shape → consists of px py pz →x+y+z are axis