1 Terms
Home > Industry/Domain > Aviation > Aeronautics
Aeronautics
The branch of science that deals with flight aerodynamics and with the operation of all types of aircraft.
Industry: Aviation
Add a new termContributors in Aeronautics
Aeronautics
鐳
Aviation; Aeronautics
放射性化學元素用作在醫學和工業射線照相的中子源 鐳的原子序數是 88，和它的標誌是 ra. 它最豐富的天然的同位素有大量的 226 和 1,620 年的半衰期。
