The table shows the amount of radioactive element remaining in a sample over a period of time. Radioactive Decay Rate
Amount of Radioactive Sample Time
(grams)
(years)
56.0
0
47.1
400
39.6
800
333
1.200
28
1.600
Part 1 What is the half-life of the element? Explain how you determined this
Part 2: How long would it take 312 g of the sample to decay to 9.75 grams? Show your work or explain your answer

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.