Today, this model is known as the quantum model or the electron cloud model. The inner orbitals surrounding the atom are spherical but the outer orbitals are much more complicated.

A hydrogen atom has one proton as the nucleus and one electron in the region outside the nucleus. The electron and proton are attracted to each other. This attraction holds the atom together. It is ...

The electron cloud model shows that electrons are not shared equally in the water molecule. Electrons are a bit more attracted to the oxygen atom than they are to the hydrogen atoms. This makes the ...