5B10.81
Boron
Metalloid · element 5 · group 13, period 2
Quick facts
| Symbol | B |
|---|---|
| Atomic number | 5 |
| Relative atomic mass | 10.81 |
| Category | Metalloid |
| Position | group 13, period 2 |
| State at 20 °C | Solid |
| Melting point | 2,076 °C |
| Boiling point | 3,927 °C |
| Density | 2.34 g/cm³ |
| Electronegativity | 2.04 |
| Electron configuration | [He] 2s2 2p1 |
About Boron
Boron has the symbol B and atomic number 5, which means every boron atom has 5 protons in its nucleus and, in a neutral atom, 5 electrons. At room temperature it is a solid.
Metalloids have properties between metals and non-metals. Several, like silicon, are semiconductors used in electronics.
It melts at 2,076 °C and boils at 3,927 °C.
Explore it
See where boron sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.