Some atoms are unstable and will undergo radioactive decay. When this happens, they emit ionizing radiation are often transformed into another element. This article explains how to calculate rates of radioactive decay. Atoms which are prone to radioactive decay are known as radionuclides. Radionuclides can occur naturally, or can be man-made â such as during the fission process in a nuclear reactor.
Sir Francis Drake with his new heraldic achievement, with motto: Sic Parvis Magna, translated literally: Thus great things from small things (come). The hand out of the clouds is labelled Auxilio Divino, or With Divine Help.
Definition of PICEA. : a genus of temperate and arctic evergreen trees (family Pinaceae) having acicular leaves that are keeled on both surfaces and borne individually on persistent peg-shaped bases and cones that become pendulous and have reflexed scales â see spruce.ew Latin, from Latin, pitch pine, from pic-, pix pitch. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis. Note that some information is displayed differently in the Unabridged.