Atomic Number of Molybdenum. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. The chemical symbol for Molybdenum is Mo. Atomic Mass of Molybdenum. Atomic mass of Molybdenum is 95.94 u.
Definition of elective. 1  1a : chosen or filled by popular election an elective officialb : of or relating to electionc : based on the right or principle of election the presidency is an elective office. 2  2a : permitting a choice : optional an elective course in schoolb : beneficial to the patient but not essential for survival elective surgery.
Two types of electives exist. One is electives within a specific subject area, which fulfill the requirements of a major or program of study. The second type of electives is free electives, used to complete the number of credits required for a degree (commonly 60 for an associateâs, and 120 for a bachelorâs).