Radioactive dating

28-Dec-2017 05:01

When a tree is cut down, these periods are exhibited in a cross section of the trunk in the form of rings.Simply counting the number of rings will give one a fairly good idea of the age of the tree.

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By measuring the amount of carbon-14 left in dead organic material the approximate time since it died can be worked out.The name 'radioactive' may suggest to you that radioactive elements radiate radio waves, but unfortunately that is not so!The name 'radioactivity' is a misnomer because these elements have nothing to do with radio waves! To understand radioactivity, we need to explore the structure of an atomic nucleus.A radioactive element is one with an unstable nucleus, which radiates alpha, beta or gamma radiation and gets converted to a stable element.

This article has a comprehensive list of radioactive elements and their properties.The kinetic energy of the impacting meteorite or asteroid is converted into heat, sound, and mechanical energy---the projectile explodes on impact.