Name: Lanthanum

Atomic Symbol and Mass Number: La [57]

Electron Configuration: [Xe] 5d¹6s²

Atomic Radii: 187 pm

Electron Affinity: 48 kJ mol‑1

Oxidation States: +3, +2, +1

Electronegativity Value: 1.10

Elemental Group: Lanthanide

Uses and Properties:

• Lanthanum is one of the rare earth elements used to make carbon arc lights which are used in the motion picture industry for studio lighting and projector lights. 

• Lanthanum also makes up about 25% of Misch metal, a material that is used to make flints for lighters.

• Its alloys have a variety of uses. The best-known use for this alloy is in 'flints' for cigarette lighters.

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Lewis Diagram: