Virtue ethics is based on the consequences of actions, whereas principle-based ethics is based on character traits. c. Virtue ethics is based on set of rules, whereas principle-based ethics is based on consequences of actions.
The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding cloud of electrons. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius.
The Bohr radius (a 0 or r Bohr) is a physical constant, approximately equal to the most probable distance between the nucleus and the electron in a hydrogen atom in its ground state. It is named after Niels Bohr, due to its role in the Bohr model of an atom. Its value is 5.291 772 1067 (12) Ã 10 â11 m.