资讯
AT a symposium held by the American Chemical Society at Syracuse University on June 30, J. A. Marinsky and L. E. Glendenin, who during the War had succeeded in separating element 61 from the other ...
They will be introduced to the basic information given for the elements in most periodic tables: the name, symbol, atomic number, and atomic mass for each element. Students will focus on the first 20 ...
Element Symbols: Each element is represented by a unique one- or two-letter symbol, usually derived from its English or Latin name (e.g., H for Hydrogen, Au for Gold from "Aurum").
8月
Live Science on MSNPeriodic table of elements quiz: How many elements can you name in 10 minutes? - MSNIn this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, ...
In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, atomic weight and the broad group they live in.
当前正在显示可能无法访问的结果。
隐藏无法访问的结果