Based on the periodic table, the element mendeleev called eka-manganese is now called technetium. Technetium<span> is a silvery-gray metal that tarnishes slowly in moist air. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
Force causes all motion, and the larger the mass of an object the stronger the force needs to be to accelerate the object.
Each correspond to a principal energy level
