Easily put, an electron is a subatomic particle that carries a negative electric charge. There are no known components, so it is believed to be an elementary particle(basic building block of the universe). The mass of an electron is 1/1836 of its proton. Electrons have an antiparticle called a positron.
Double Oven Average Costs . Double ovens start at around $1,250 to $2,500 and can cost as much as $4,000 to $5,000 or more. Professional installation of a double oven might cost $100 to $200 (or more, if cabinet alteration is required). To make installation as easy as possible, look for a double oven that's the same size as your old oven.
Double Wall Ovens When you install a double oven, you get added the added convenience of cooking different dishes at different temperatures. Or you can set one oven to a warming setting, which keeps the dish at the perfect temperature while you wait for bread to finish baking, or your lasagna to finish cooking. Some double ovens offer a traditional oven plus a microwave oven, so that you can optimize your cooking and heating needs. Some models offer a steam clean option to keep your ovens spotless, even if one of your dishes spills.