Facts Figures And Dates

Alkaline earth metals facts

alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), an. [PDF Version]

Facts about fuel cells

Unlike batteries, which store energy, fuel cells generate power as long as they have a fuel supply. They are clean, efficient, and versatile, making them a promising technology for various applications, from powering vehicles to providing electricity for homes and businesses. Hydrogen is the simplest and most abundant element in the universe, but it rarely exists as a gas on Earth—it must be separated from. . fuel cell, any of a class of devices that convert the chemical energy of a fuel directly into electricity by electrochemical reactions. A fuel cell resembles a battery in many respects, but it can supply electrical energy over a much longer period of time. It does this by mixing a special fuel (usually hydrogen) with air. This reaction creates water and sometimes carbon dioxide. [PDF Version]