Was it not Neils Bohr.
http://en.wikipedia.org/wiki/Niels_Bohr#Atomic_research
Neils Bohr
The chemical behavior is determined largely by the number of valence electrons.
There are 11 electrons orbiting around Na atom, cuz its atomic number is 11.
Bohr Hypothesized That the atom is a nucleus with electrons orbiting around it.
The particles found in the area surrounding the nucleus are called electrons. Electrons are attracted to the protons in the nucleus, but are repelled from other electrons. This is why they can be found orbiting the nucleus.
Bound electrons are the electrons locked in orbit of the atom which are held in orbit by its attraction to the positive charge of the proton(s) in the nucleus. Electrons have a negative charge. Conversely, the free electrons are electrons that are not orbiting the nucleus of an atom normally in the form of static electricity. Valence electrons are the electrons orbiting the outermost shell of the atom are weakly held by the positive proton charges and can be transferred to or shared with one or more other atoms. Valence electrons are bound until they are freed by some outside force or reaction.
Niels Bohr.
Orbiting planet and orbiting electrons in stable atoms.
electrons
Who? Niels Bohr started the concept of electrons orbiting the nucleus, but I'm not sure he called them shells, but more along the lines of energy levels.
Electrons, my confused compadre. Electrons.
Orbiting the atom.
Orbiting around the nucleus.
If you're referring to the nucleus of an atom, the answer is electrons.
Electrons or orbiting electrons leaving their orbit by an outside influence a force .
they are the outermost electrons orbiting the nucleas
Electrons orbit the nucleus of an atom.
It is Oxygen. Oxygen contains 8 Protons and 8 Neutrons in the Nucleus. It also has 8 Electrons orbiting on two rings around the nucleus. The closest ring (to the nucleus) has two Electrons orbiting, and the furthest ring has six Electrons orbiting. This should answer the Question.