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.
In the Bohr model, electrons were assigned to different shells. These shells explained the repeating patterns of chemical properties in the periodic table. Using quantum mechanics, chemists can use the electron cloud model to assign electrons to different atomic orbitals. These atomic orbitals are not all spheres.n the Bohr model, electrons were assigned to different shells. These shells explained the repeating patterns of chemical properties in the periodic table. Using quantum mechanics, chemists can use the electron cloud model to assign electrons to different atomic orbitals. These atomic orbitals are not all spheres.