Beryllium is a chemical element with the symbol Be and atomic number 4. It is a grayish-white metallic element that is part of the alkaline earth metals group in the periodic table. Beryllium is known for its high stiffness, low density, and excellent thermal and electrical conductivity. Some key properties of beryllium include: - **Atomic Mass**: Approximately 9.0122 u. - **Density**: About 1.
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