For beverage purchases, 15% of the bill is automatically added to the Sail & Sign charge. Room Service staff may be tipped as service is rendered. Tipping applies regardless of the dining options selected, such as eating at the casual dining restaurant or Open Seating Dining.
Radium is a highly radioactive alkali metal. It undergoes alpha decay, which is radioactive decay by the release of an alpha particle from a nucleus. The alpha particle is a helium-4 nucleus, and it can do a lot of damage. If an individual is up against a radium source, or if he ingests or breathes radium, he will have tissues exposed to the extremely destructive radiation. That's what makes radium so dangerous. That and the fact that its radioactive decay daughters are also radioactive, and an individual exposed to radium and having that radium decay (causing biological damage) will then face the radiation hazards of the daughters of radium, because they are all radioactive, too.
Radium is a silvery-white metal. It is highly radioactive and its decay product, radon gas, is also radioactive. One result of radiumâs intense radioactivity is that the metal and its compounds glow in the dark. When it is exposed to air, it reacts with nitrogen to quickly form a black coating of radium nitride.iscovery of Radium. Radium was discovered in 1898 in Paris, by Marie S. Curie and her husband Pierre in pitchblende (mainly uranium dioxide, UO 2).