ABOUT COCARD. Since 1999, COCARD has been a company composed of like-minded, owner-operated, sub-ISOs. We have formed an entity whose purposes and structure allow us to capitalize on collective bargaining benefits and a mutually leveraged exit strategy. COCARD is managed by member volunteers with over 100 years of industry experience.
Description of his model: Bohrâs atom like Rutherfordâs contained a dense, positive nucleus. He expanded on Rutherfordâs ideas, turning his attention to describing the electron. He stated they moved in fixed, circular orbits (or energy levels) around the nucleus, these called electron shells.
One model of the atom states that instead of electrons being tiny particles in orbits, they are in the form of an electron cloud in shells around the nucleus.This model is due to the Uncertainty Principle and is useful in Quantum Mechanics.he Bohr model or solar system model of the atom is that the atom is like a tiny solar system, with the nucleus in the center and electrons rotating around the nucleus in orbits, similar to how the planets rotate around the Sun.