What are elements and how do they differ?

elements are pure substances that cannot be broken down

the different between elements are their luster, scratch physical properties like their color and roughness and chemical reactions.

Explanation:

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.