Rebecca Robbins and The Oregon Center for the Alexander Technique. As the most experienced teacher in the Pacific Northwest, I welcome the opportunity to teach the Alexander Technique to you or those you know. If you are looking to train to be a teacher, I can offer a continuation of the excellent training that I received.
A is the correct answer. Protons and neutrons are the two subatomic particles located in the nucleus of an atom. Electrons are found in a cloud, floating around the atom.
Various extensions of the Standard Model predict the existence of an elementary graviton particle and many other elementary particles. Composite subatomic particles (such as protons or atomic nuclei) are bound states of two or more elementary particles. For example, a proton is made of two up quarks and one down quark, while the atomic nucleus of helium-4 is composed of two protons and two neutrons.