Iodine-131 (usually in the chemical form of iodide) is a component of nuclear fallout, and is particularly dangerous owing to the thyroid gland's propensity to concentrate ingested iodine, where it is kept for periods longer than this isotope's radiological half-life of eight days.
Magma is composed of molten rock and is stored in the Earthâs crust. Lava is magma that reaches the surface of our planet through a volcano vent. Lava flow, Hawai. Courtesy of the U.S. Geological Society.agma is composed of molten rock and is stored in the Earthâs crust. Lava is magma that reaches the surface of our planet through a volcano vent. Lava flow, Hawai. Courtesy of the U.S. Geological Society.
A lava volcano is a vent or hole in the ground through which molten  rock, called lava, erupts.Lava volcano is not a technical term,  but it makes an important distinctio â¦ n, as not all volcanic  eruptions produce lava.Answered. In Volcanoes.nside a volcano is molten rock. When there is too much pressure and heat in that volcano, the rock melts and becomes magma, when it reaches the Earths surface it is now lava. â¦. 43 people found this useful.