Group III Elements

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Boron – ₅ B → 2, 3

Aluminium –  ₁₃ Al → 2, 8, 3

Group III elements include boron, aluminium, gallium, indium, and thallium. Group III elements have atoms with 3 valence electrons, hence they are trivalent elementsAn atom, ion, or element with a valence of three, is called trivalent. Examples of trivalent atoms are boron, aluminium, gallium, indium, etc. More.

Aluminium is the third most abundant metal in the earth’s crust and the third most abundant element.

Al  → Al³⁺ + 3e^–

Since