21Sc44.956
Scandium
Transition metal · element 21 · group 3, period 4
Quick facts
| Symbol | Sc |
|---|---|
| Atomic number | 21 |
| Relative atomic mass | 44.956 |
| Category | Transition metal |
| Position | group 3, period 4 |
| State at 20 °C | Solid |
| Melting point | 1,541 °C |
| Boiling point | 2,836 °C |
| Density | 2.985 g/cm³ |
| Electronegativity | 1.36 |
| Electron configuration | [Ar] 3d1 4s2 |
About Scandium
Scandium has the symbol Sc and atomic number 21, which means every scandium atom has 21 protons in its nucleus and, in a neutral atom, 21 electrons. At room temperature it is a solid.
Transition metals sit in the middle block of the periodic table. They are usually hard, dense and strong, often form coloured compounds, can have more than one ion charge, and many are useful catalysts.
It melts at 1,541 °C and boils at 2,836 °C.
Explore it
See where scandium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.