Cách sử dụng
Beryllium is a chemical element that is found in the earth's crust. It is a metal that is lightweight and strong, so it is often used in things that need to be durable, like spacecraft and airplanes. Beryllium is also used in some electrical equipment and in certain types of medical imaging. It is important to handle beryllium carefully, as it can be toxic if it is breathed in or touched for long periods of time.