Element 21 of Periodic table is
Scandium with atomic number 21,
atomic weight 44.95591.
Scandium, symbol Sc, has a
Simple Hexagonal structure and Silver color.
Scandium is a transition metal element.
Know everything about Scandium Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia.
Read key information and facts about element Scandium
Explore our interactive periodic table
Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of
The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and
ends at bottom right (atomic number 118). Therefore you can directly look for atomic number
21 to find Scandium on periodic table.
Another way to read periodic table and locate an element is by using group number (column)
and period number (row). To locate Scandium on periodic
table look for cross section of group 3 and period
4 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Scandium was discovered by Lars Fredrik Nilson in year
1879 in Sweden
derived its name from Scandia, the Latin name for Scandinavia
The table below shows the abundance of Scandium in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Scandium is Simple Hexagonal.
The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in
dimensional space to form the structure.
The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell
Lattice Constants (a, b and c)
and the angles between them Lattice Angles (alpha, beta and gamma).
The positions of the atoms inside the unit cell are described by the set of atomic positions (
xi, yi, zi) measured from a reference lattice point.
The symmetry properties of the crystal are described by the concept of space groups. All possible
symmetric arrangements of particles in three-dimensional space are described by the 230 space groups
(219 distinct types, or 230 if chiral copies are considered distinct.
Scandium atoms have 21 electrons and
the electronic shell structure is [2, 8, 9, 2] with Atomic Term Symbol (Quantum Numbers) 2D3/2.
Shell Structure of Scandium - Electrons per energy
The ground state electronic configuration of Neutral Scandium atom is
[Ar] 3d1 4s2.
The portion of Scandium configuration that is equivalent to the noble gas of
the preceding period, is abbreviated as [Ar]. For atoms with many electrons, this
notation can become lengthy and so an abbreviated notation is used.This is important as it is
the Valence electrons 3d1 4s2, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Scandium atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d1 4s2
Scandium atomic radius is 184 pm, while it's covalent radius is 144 pm.
The electron affinity of Scandium is 18.1 kJ/mol
Refer to table below for Ionization energies of Scandium
Refer to below table for Scandium Physical Properties
Scandium is Conductor of electricity. Refer to
below for the Electrical properties of Scandium
Refer to table below for Thermal properties of Scandium
Isotopes of rhodium. Naturally occurring Scandium has
1 stable isotope -
List of unique identifiers to search the element in various chemical registry databases