Climate Cosmos on MSN6 小时
The Impact of Rare Earth Mining on the Environment
Understanding Rare Earth Elements Rare earth elements, or REEs, are a group of 17 metals crucial for many modern technologies ...
BBC1 年
Atoms, elements and compounds - AQA
It's important to use the names and chemical symbols for the first 20 elements in the periodic table, as well as the elements in groups 1 and 7.