Understanding the scientific rationale behind Scandium's position in the periodic table:
Belongs to Group 3 because it has 3 valence electrons (3d¹ 4s²).
Belongs to Period 4 because its outermost electrons occupy shell n=4.
Belongs to the d-block because its differentiating electron enters the 3d subshell.
Classified as a transition metal due to its d-orbital electron configuration and metallic properties.
Hover or tap any shell orbit ring to inspect electron counts and 2n² capacities.
Educational Note: This Niels Bohr planetary model visually illustrates principal quantum energy shells ($n=1, 2, 3\dots$) and electron counts. In modern quantum mechanics (Schrödinger model), electrons do not orbit in fixed circular planetary tracks, but exist as 3D probability clouds (orbitals: $s, p, d, f$) governed by the Heisenberg uncertainty principle.
Neutral ground state configuration. Valence electrons: 3.
Dispersed in trace amounts across minerals such as thortveitite, euxenite, and uranium/titanium refining residues.
From Latin 'Scandia' meaning Scandinavia
Scandium compounds have low toxicity, but scandium dust can present a moderate fire hazard.