h alf l ife p ractice. y ou have 5 g of sodium 25. h ow much would you have after 3 half lives ?...
TRANSCRIPT
![Page 1: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/1.jpg)
HALF LIFE PRACTICE
![Page 2: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/2.jpg)
YOU HAVE 5G OF SODIUM 25. HOW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES?
Step 1:2512.56.256.25g remain
![Page 3: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/3.jpg)
Now You
![Page 4: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/4.jpg)
C14 HAS A HALF LIFE OF 5730 YEARS. IF YOU HAD 88G, HOW MUCH C14 WOULD REMAIN AFTER 5 HALF LIVES?
Step 1:884422115.52.75g
![Page 5: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/5.jpg)
![Page 6: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/6.jpg)
ACTINIUM 226 HAS A HALF LIFE OF 28 HOURS. 100 G OF ACTINIUM 226 DEGRADES OVER 56 HOURS. HOW MUCH WILL BE LEFT?
Step 1: 56/28=2Step 2: 100g50g25g
25g
![Page 7: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/7.jpg)
Now You
![Page 8: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/8.jpg)
AFTER 11,200 YEARS, A SAMPLE OF RADIUM-226 HAS DECAYED. IT HAS A HALF-LIFE OF 1600 YEARS. THE SAMPLE WAS ORIGINALLY 162 GRAMS. HOW MUCH IS LEFT?
Step 1: 11,200/1600=7Step 2:
1628140.520.2510.1255.0625 2.53125
2.53125g
![Page 9: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/9.jpg)
![Page 10: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/10.jpg)
THE HALF LIFE OF ISOTOPE X IS 2 YEARS. HOW LONG WOULD IT TAKE FOR 4G TO DECAY TO .5G?
Step 1: 421.5(3 Half lives have passed)Step 2:3X2years=6 years
![Page 11: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/11.jpg)
NOW YOU
![Page 12: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/12.jpg)
CARBON HAS A HALF LIFE OF 5730 YEARS. HOW LONG WOULD IT TAKE 100G TO DECAY TO 25 GRAMS?
Step 1:1005025 (2 half lives have passed)Step 2:5730 years X 2=11460 Years
![Page 13: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/13.jpg)
![Page 14: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/14.jpg)
A SAMPLE INITIALLY CONTAINS 60G OF THORIUM 234. AFTER 48 DAYS ONLY 7.5 GRAMS REMAIN. HOW LONG IS ONE HALF LIFE?
Step 1: 6030157.5 (3 half lives have passed)
Step2: 48/3=16
16 days
![Page 15: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/15.jpg)
Now You
![Page 16: H ALF L IFE P RACTICE. Y OU HAVE 5 G OF SODIUM 25. H OW MUCH WOULD YOU HAVE AFTER 3 HALF LIVES ? Step 1: 25 12.5 6.25 6.25g remain](https://reader036.vdocument.in/reader036/viewer/2022062423/56649f005503460f94c16537/html5/thumbnails/16.jpg)
WE START WITH 500G OF ISOTOPE X. IN 10,000 YEARS WE END WITH 7.8G. HOW LING IS ONE HALF LIFE FOR ISOTOPE X?
Step 1: 50025012562.531.2515.67.8
(6 half lives have passed)Step 2: 10,000/6 = 1666.66
One half life is 1666.66 years