Half-Life

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By: eoinos1 (117 month(s) ago)

to download

By: skuldrive (117 month(s) ago)

can I download the presentation?

By: skuldrive (117 month(s) ago)

its very enlightening...thanks for the post!

By: nagi_shahin (124 month(s) ago)

this is the first time to inter this site sorry

By: qks123 (107 month(s) ago)

to download

 

By: xinqi_110 (125 month(s) ago)

The dice one was perfect to simulatie the half life

Presentation Transcript

Half-Life : 

Half-Life Time it takes for half of a radioactive sample to decay Describes rate of decay Less stable - faster decay

Half-Life Visual : 

Half-Life Visual After each half-life, half of the sample changes. START 100%

Half-Life Visual : 

Half-Life Visual After each half-life, half of the sample changes. START 100% 1 half-life 50% 50% transmutes into another element

Half-Life Visual : 

Half-Life Visual After each half-life, half of the sample changes. START 100% 1 half-life 50% 2 half-lives 25% 50% of the 50% then transmutes into another element

Half-Life Visual : 

Half-Life Visual After each half-life, half of the sample changes. START 100% 1 half-life 50% 2 half-lives 25% 3 half-lives 12.5% 50% of the 25% then transmutes into another element This leaves 12.5%

Half-Life Visual : 

Half-Life Visual After each half-life, half of the sample changes. START 100% 1 half-life 50% 2 half-lives 25% 3 half-lives 12.5% 4 half-lives 6.25%

Half-Life Visual : 

Half-Life Visual After each half-life, half of the sample changes. START 100% 1 half-life 50% 2 half-lives 25% 3 half-lives 12.5% 4 half-lives 6.25% 5 half-lives 3.125%

Half-Life Visual : 

Half-Life Visual After each half-life, half of the sample changes. START 100% 1 half-life 50% 2 half-lives 25% 3 half-lives 12.5% 4 half-lives 6.25% 5 half-lives 3.125% 6 half-lives 1.5625%

Half-Life Visual : 

Half-Life Visual After each half-life, half of the sample changes. START 100% 1 half-life 50% 2 half-lives 25% 3 half-lives 12.5% 4 half-lives 6.25% 5 half-lives 3.125% 6 half-lives 1.5625% 7 half-lives .78125%

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay) 83Bi  -1e + ?? 210 0 ?

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay) 83Bi  -1e + ?? 210 0 210

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay) 83Bi  -1e + 84? 210 0 210

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay) 83Bi  -1e + 84Po 210 0 210

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210)

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10 0.12 g Bi-210 0.88 g Po-210 day 15

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10 0.12 g Bi-210 0.88 g Po-210 day 15 0.062 g Bi-210 0.94 g Po-210 day 20

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10 0.12 g Bi-210 0.88 g Po-210 day 15 0.062 g Bi-210 0.94 g Po-210 day 20 0.031 g Bi-210 0.97 g Po-210 day 25

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10 0.12 g Bi-210 0.88 g Po-210 day 15 0.062 g Bi-210 0.94 g Po-210 day 20 0.031 g Bi-210 0.97 g Po-210 day 25 0.016 g Bi-210 0.99 g Po-210 day 30

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10 0.12 g Bi-210 0.88 g Po-210 day 15 0.062 g Bi-210 0.94 g Po-210 day 20 0.031 g Bi-210 0.97 g Po-210 day 25 0.016 g Bi-210 0.99 g Po-210 day 30 0.0080 g Bi-210 0.99 g Po-210 day 35

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10 0.12 g Bi-210 0.88 g Po-210 day 15 0.062 g Bi-210 0.94 g Po-210 day 20 0.031 g Bi-210 0.97 g Po-210 day 25 0.016 g Bi-210 0.99 g Po-210 day 30 0.0080 g Bi-210 0.99 g Po-210 day 35 0.0040 g Bi-210 0.99 g Po-210 day 40

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10 0.12 g Bi-210 0.88 g Po-210 day 15 0.062 g Bi-210 0.94 g Po-210 day 20 0.031 g Bi-210 0.97 g Po-210 day 25 0.016 g Bi-210 0.99 g Po-210 day 30 0.0080 g Bi-210 0.99 g Po-210 day 35 0.0040 g Bi-210 0.99 g Po-210 day 40 0.0020 g Bi-210 0.99 g Po-210 day 45

Half-Life Again : 

Half-Life Again 1.00 g of Bi-210 (beta decay to Po-210) 0.50 g Bi-210 0.50 g Po-210 day 5 0.25 g Bi-210 0.75 g Po-210 day 10 0.12 g Bi-210 0.88 g Po-210 day 15 0.062 g Bi-210 0.94 g Po-210 day 20 0.031 g Bi-210 0.97 g Po-210 day 25 0.016 g Bi-210 0.99 g Po-210 day 30 0.0080 g Bi-210 0.99 g Po-210 day 35 0.0040 g Bi-210 0.99 g Po-210 day 40 0.0020 g Bi-210 0.99 g Po-210 day 45 0.0010 g Bi-210 0.99 g Po-210 day 50

?Safe Samples? : 

?Safe Samples? Each half-life reduces amount of radioisotope Amount never becomes zero After 10 half-lives sample considered nonradioactive

Uses of Radioisotopes : 

Uses of Radioisotopes Radioactive Dating Nuclear Medicine Food Preservation

Radioactive Dating : 

Radioactive Dating Estimates age of very old objects Uses carbon-14 Possible other isotopes Uranium - 235 Potassium - 40 Samarium - 147

Radiocarbon Dating : 

Radiocarbon Dating Half-life 5730 years Found in all living things Tiny amount Compare to amount carbon-12 Living organisms maintain carbon-14 After dying, carbon-14 decays

Nuclear Medicine : 

Nuclear Medicine X-rays Radiotracers Radiotherapy

Nuclear Medicine : 

Nuclear Medicine X-rays Image inside the body CAT Different angles Injuries related to head or brain

Nuclear Medicine : 

Nuclear Medicine X-rays Radiotracers Tiny amount of radioisotope Path traced through body Short half-life

Nuclear Medicine : 

Nuclear Medicine X-rays Radiotracers Radiotherapy Direct beam at specific area with cancer Fast growing cells vulnerable

Food Preservation : 

Food Preservation Fresh foods susceptible to mold or bacteria Irradiated when packaged Exposed to radiation Food not radioactive Radiation passes through

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