If a 50.42 mg sample of a pure radioisotope has a half-life of 38 days, what will be the mass of the original radioisotope after 1 year (365 days)? Include 3 significant figures

How many half-lives did a radio-active sample complete is 2.5 g of a sample remains from 20.0 g initial material?

24g of an unknown radioactive substance decays to 1.5g after 180 seconds. What is the half-life of this substance?

||| Understanding radioactive half life sample A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 19.00 umol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/4 of the initial amount. A B C D Explanation symbol 33 15 188 75 127 54 227 89 radionuclide P Re Xe Ac Check half-life 25. days 17. hours 36. days 22. years initial radioactivity (choose one) B (choose one) (choose one) O (choose one) e time for amount of radionuclide to decrease to 1/4 of initial amount X days hours days years S MacBook Pro 0/3 Kimberly V ( Ⓒ2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility ?圖□ 圆图 olo Ar