Podcast
Questions and Answers
Which metal is used in making heat-sensitive thermometers?
Which metal is used in making heat-sensitive thermometers?
Which of the following species cannot exist?
Which of the following species cannot exist?
Which of the following elements has the highest melting point?
Which of the following elements has the highest melting point?
The stability of the +1 oxidation state increases or decreases in the following sequence:
The stability of the +1 oxidation state increases or decreases in the following sequence:
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Which of the following elements has the lowest melting point?
Which of the following elements has the lowest melting point?
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The increasing order of atomic radii of the following group 13 elements is:
The increasing order of atomic radii of the following group 13 elements is:
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Which of the following properties does not support the anomalous behavior of Boron?
Which of the following properties does not support the anomalous behavior of Boron?
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Which metal is protected by a layer of its own oxide?
Which metal is protected by a layer of its own oxide?
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Study Notes
Group 13 Elements
- Gallium is a soft, heavy metal with a low melting point, used in making heat-sensitive thermometers.
Metal Properties
- Caesium and Potassium are not used in making heat-sensitive thermometers.
- The stability of the +1 oxidation state increases down the group in group 13 elements.
Melting Points of Elements
- Gallium has a higher melting point than Aluminium, Indium, and Boron.
- The correct order of melting points is In > Al > Ga > B.
Atomic Radii of Group 13 Elements
- The correct increasing order of atomic radii is B < Al < Ga < In < Tl.
Anomalous Behaviour of Boron
- Boron's small size, high electronegativity, and high ionization energy contribute to its anomalous behaviour.
- The formation of trihalides is not a characteristic that supports Boron's anomalous behaviour.
Properties of Boron
- Amorphous Boron burns in air to form a mixture of Boric Oxide and Nitrogen.
- Boron is unable to form BF6 due to its lack of d-orbitals.
Oxide Layers of Metals
- Aluminium is protected by a layer of its own oxide.
Amphoteric Nature of Elements
- Aluminium is an amphoteric element.
Group 14 Elements
- The most basic oxide of elements in group 14 of the periodic table is PbO.
Dihalides of Group 14 Elements
- The stability of dihalides of Sn and Pb increases steadily in the sequence SnX2 < GeX2 < SiX2.
Ability to form -p Multiple Bonds
- Carbon shows a greater ability to form -p multiple bonds.
Comparison of Group 14 Elements
- Silicon and Germanium are more likely to form -p multiple bonds than Tin and Lead.
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Description
Explore the properties and trends of group 13 elements, including melting points, oxidation states, and applications in thermometers.
