Physical and chemical index: Melting Point (K): 544.5 Boiling Point (K): 1883 Appearance: Hard, brittle, steel-gray metal with a pinkish tinge Atomic Radius (pm): 170 Atomic Volume (cc/mol): 21.3 Covalent Radius (pm): 146 Atomic Number: 83 Atomic Weight: 208.98037 Element Classification: Other Metal Discovered By: Known to the ancients. Discovery Date: n/a (Unknown) Name Origin: German: bisemutum, (white mass), Now spelled wismut. Density (g/cc): 9.8 Package include: 1Pc 10g/ 100g Bismuth metal Note: 1. Due to manual measurement, please allow an error of 1-3mm. 2. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.