CH1012
L1 /
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L1 /
5
GROUP 3A PROPERTIES
• Covalent bond character is of major importance in this
group & boron cmpds tend to resemble those of other non-metals (eg. Si) in their
properties and reactions.
• Elemental boron is a network covalent
(means bonding like diamond or quartz)
metalloid and a semiconductor.
(cf. semiconductor is a substance where the conductivity increases as T is increased.)
(means bonding like diamond or quartz)
metalloid and a semiconductor.
(cf. semiconductor is a substance where the conductivity increases as T is increased.)
• Aluminium, gallium, indium, and thallium are considerably
larger than boron, and are much more metallic giving compounds which are ionic in character.
