Answer: radio
radium
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Radium is a chemical element with the symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table also known as the alkaline earth metals.Pure radium is silvery-white but it readily reacts with nitrogen (rather than oxygen) on exposure to air forming a black surface layer of radium nitride (Ra 3 N 2).
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Radium is a radioactive substance found in nature that can have adverse health effects under certain conditions. How was Radium commonly used? At the beginning of the 20th century Radium was thought to have beneficial health properties and was often added to consumer products such as toothpaste hair creams and even food.
Radium is a radioactive substance found in nature. Radium is produced by the radioactive decay of uranium. The intensity of radiation from radioactive materials decreases over time. The time required for the intensity to decrease by one-half is referred to as the half-life.
Radium s main practical use has been in medicine producing radon gas from radium chloride to be used in radiotherapy for cancer. This was a process started in Marie Curie's time. The early researchers found they received skin burns from handling the radioactive materials and when the Curies worked with doctors they discovered that radiatio...