Very. It appears in many glow-in-the-dark watches.
The first name was radium; some isotopes had in the past other names.
The cost of radium can vary depending on the form and quantity being purchased. However, radium is a highly regulated radioactive element, and acquiring it can be expensive due to its rarity and the associated safety and security considerations. Additionally, the handling, transportation, and disposal of radium require specialized procedures and equipment, further contributing to its overall cost.
Radium is not a common commercial product; radium (generally as radium chloride solution) is sold only to hospitals or specialized and controlled research laboratories.
Radium has today 33 isotopes and 12 nuclear isomers.
The most common state of matter for radium is solid, specifically a metallic solid. Radium is a radioactive element that is typically found in the solid form due to its high atomic number and density.
1. Radium has 45 isotopes and nuclear isomers. 2. Radium has no known today allotropes.
The atomic mass of the most common isotope of radium (226Ra) is: 226,025 409 8(25).
Radium reflects in clocks by emitting a glow due to its radioactive decay. The radium releases energy in the form of light, causing the clock hands and numbers to appear illuminated in the dark. The use of radium for this purpose was common in the early to mid-20th century until its health risks were recognized.
It is illegal to purchase or sell radium without the appropriate licenses due to its high radioactivity. Handling radium without proper training and safety measures can be extremely hazardous to health and the environment.
Extremely expensive; radium is not a common commercial product. Radium can be delivered only to specialized research institutes.
Radium has several isotopes, but the most common one is radium-226. This isotope has an atomic number of 88, indicating it has 88 protons. Since the mass number of radium-226 is 226, it contains a total of 226 nucleons, which includes both protons and neutrons. Therefore, radium-226 has 138 neutrons (226 - 88 = 138).
The density of radium at about room temperature is 5.5  g·cm−3. That's 5.5 grams per cubic centimeter, or 5.5 grams per milliliter. A link to the Wikipedia article on radium is provided.