Please help me with this Which of the following is a physical property?
A reaction with oxygen
A reaction with water
The colour red
Does the substance burn?

ugh fiel iente of insistí is did kiwis jaj

a electronegativity decreases beacuse the size of nucleus is bigger.

there are two significant figures.

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.