Question

In group 13, the only metalloid, boron, is at the very top of the group. Explain why the rest of the group has mettalic behavior but boron doesnt

Answer 1

B (boron) is the only metalloid of that group

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now the rest listed below

Al (aluminum) metal

Ga (gallium) metal

In ( indium) metal

Ti (thallium) metal

uut metal

they all have 3 electrons in their outter most shells, they have high electrical conductivity, they are soft in nature, have low melting points.

Answer 2

Boron is electron-deficient, possessing a vacant p-orbital.

Step-by-step explanation:

Boron is the only non-metal of the group 3A or group 13 of the periodic table the elements. All group 3A member elements are electropositive ( they have the tendency to loose electron in chemical reactions).

Boron is electron-deficient and possesses a vacant p-orbital. Also, Boron is the least electronegative non-metal, so it readily loses electrons when reacting.

Although, Boron is not a complete non-metal, it is metalloid (that is, boron has the characteristics of metals and non-metals).

Boron can exist in the crystalline form and amorphous form.

The group 3A or group 13 consist of Boron, Aluminum, Gallium, Indium and Thallium. All the elements have 3 valence electrons