Group III Elements

Boron – ₅B → 2, 3

Aluminium – ₁₃Al → 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 they are electron donors, they are reducing in nature and form electrovalent compoundsAn electrovalent or ionic bond is formed when a metal atom transfers one or more electrons to a non-metal atom. Ionic or electrovalent compounds are those compounds which are formed by... More.

Aluminium reacts with steam at about 750°C to liberate hydrogen. 

\( \scriptsize 2Al_{(s)} \: + \: 3H_2O_{(g)} \overset{750^oC}{\rightarrow} Al_2O_{3(s)} \: + \: 3H_2{(g)} \)