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.
On average, gas ovens cost around Â£9 a year to run, whereas electric ovens cost around Â£44 a year, so installing a gas oven gives you an annual saving of Â£35. microwave, for instance, can offer a cheaper way to cook than by oven, and sometimes cheaper than a hob. Halogen ovens (pictured below) also make bold claims about the amount of energy they save. They can roast a chicken in 30 minutes and use 75pc less electricity than a conventional electric oven.