a radioactive element has a half-life of 30 days. calculate the mass of the element that remains after 20 days if 100g of the element decays. Also, calculate the decay constant.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Part 1: include important facts found through your research. part 2: include your visual display. include your summary of “the chemistry of water” from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.