Molybdenum is a chemical element with the symbol Mo and atomic number 42. Its electronic configuration is [Kr] 4d5 5s1 and electrons per energy level is 2,8,18,13,1. The arrangement of electrons in an atom in different energy levels and sub-levels is called electronic configuration, and it's the basis of the modern periodic table.
Apparent power is the product of the root-mean-square of voltage and current. Electrical engineers take apparent power into account when designing and operating power systems, because though the current associated with reactive power does no work at the load, it heats the conductors and wastes energy.
Electric power is the rate at which an electrical circuit transfers  electric energy. The SI unit of power is the watt which is one  joule per second. Wattage, Watts, and (W) are what power is measured in there just different ways to say watts. Watts is the term used to define a quantity of power. If you were  looking for a device used to measure power, that is called a  wattmeter.