What is radioactivity , Biology

Assignment Help:

What is Radioactivity ?

Radioactivity :  Some isotopes, called radioisotopes, have unstable nuclei that release high energy particles or radiant energy, or both. An example is tritium, or 3H. Tritium has two neutrons and a proton in its nucleus. When an unstable nucleus disintegrates into particle fragments and radiation, the element gradually forms an element with lower atomic weight and number.

Radioisotopes have a unique half-life, or time period in which half of the atoms disintegrate into a nonradioactive state. The half-life of the radioisotope 14C is used in dating fossils and archeological specimens.

Biologists also use radioactive atoms such as tritium as "labels" in molecules so that their pathways in biological reactions can be traced. The radiation is detected with radiation counters or by its reaction with photographic films, which provides a track.

 


Related Discussions:- What is radioactivity

Clinical presentation and investigation of hypertension, Any elevation in B...

Any elevation in BP is accompanied by increased risk of cardiovascular and cerebrovascular events and renal damage. The most distinctive pathological consequence

Determine the proecss of contrast sense, Contrast sense Sense of contr...

Contrast sense Sense of contrast is the ability to perceive slight changes in luminance between regions which are not separated by definite borders. This is as important as to

Explain performance testing of fats and oil, Explain performance testing of...

Explain performance testing of fats and oil In these cases, performance testing is the only means for evaluating the ability of fat or oil to perform the desired functions in a

Embden meyerhof pathway, Anaerobic Oxidation Embden Meyerhof pathway ...

Anaerobic Oxidation Embden Meyerhof pathway The initial  stage of biological oxidiation  includes  a series of nine  main sequential   steps  of reactions  known  as Embd

What would be the progeny of these crosses, Suppose that you are raising Do...

Suppose that you are raising Downton wombats, carefully because they bite when teased.You notice that some of your wombats have white spots, whereas others have solid coats. What t

Can you explain myopia and hypermetropia, Q. How can the visual deficiencie...

Q. How can the visual deficiencies known as myopia and hypermetropia be optically explained? Myopia is the visual condition in which the images are formed previous to (in front

People who are at risk from drug-nutrient interactions, Determine People wh...

Determine People who are at risk from drug-nutrient interactions? People who are at risk from drug-nutrient interactions are the: 1. Persons who have a poor diet or in other

Greenfields hollow implant, In 1906, Greenfield described the fabrication a...

In 1906, Greenfield described the fabrication and insertion of an endossoeus implant. He for the first time, used a basket shaped, round, hollow implant made of an iridium-platinu

Leaf, Which one of the following is an example of a tree having simple leaf...

Which one of the following is an example of a tree having simple leaf ? 1. Neem 2. Rose 3. Mimosa pudica 4, Peepal.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd