Tags: sign (12 pics) Radioactive decay is the process in which an unstable atomic nucleus spontaneously loses energy by emitting ionizing particles and radiation. This decay, or loss of energy, results in an atom of one type, called the parent nuclide transforming to an atom of a different type, named the daughter nuclide. For example: a carbon-14 atom (the "parent") emits radiation and transforms to a nitrogen-14 atom (the "daughter"). This is a stochastic process on the atomic level, in that it is impossible to predict when a given atom will decay, but given a large number of similar atoms the decay rate, on average, is predictable. The SI unit of activity is the becquerel (Bq). One Bq is defined as one transformation (or decay) per second. Since any reasonably-sized sample of radioactive material contains many atoms, a Bq is a tiny measure of activity; amounts on the order of TBq (terabecquerel) or GBq (gigabecquerel) are commonly used. Another unit of radioactivity is the curie, Ci, which was originally defined as the amount of radium emanation (radon-222) in equilibrium with of one gram of pure radium, isotope Ra-226. At present it is equal, by definition, to the activity of any radionuclide decaying with a disintegration rate of 3.7 × 1010 (1002 years ago) Bq. The use of Ci is presently discouraged by the SI.

Navigation Previous picture Back to gallery Next picture View in fullscreen Rate this picture Click on the star to vote Download 1280x800 - widescreen 1440x900 - widescreen 1680x1050 - widescreen Use this wallpaper Set this wallpaper as homepage Comments

Users who have seen this wallpaper have also seen:

Eye

Skull Wallpaper

Moving Music

Sexy Teacher

Rings

Random Miscellaneous pictures

Tulips on wheel

Temple Grounds

Spectrum of the sky

Issuance

Surface Touch

Request deletion of this wallpaper

Claim ownership of this picture