Name:  Scandium

Atomic Symbol and Mass Number: Sc [21]

Electron Configurations of the Elements: [Ar] 3d   s

Atomic Radii: 230 pm

Electron Affinity: 18.1 kJ mol-1

Oxidation status: +3

Electronegativity value: 1.36

Elemental Group: Transition Metal

Uses and properties:

• Scandium is a soft, light, silvery-white metal, which becomes slightly tinged with yellow or pink when exposed to air

• Almost as light (low density) as aluminum but it has a much higher melting point

• Scandium reacts with many acids

• Its oxide is white and most of its salts are colorless

• Scandium is used in aluminum-scandium alloys for aerospace industry components and for sports equipment

• Scandium iodide is used in mercury vapor lamps

• Very dilute scandium sulfate is used to improve the germination of seeds such as corn, peas and wheat

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Lewis diagram: