388
Question
Which of the following elements melt above 1273 K – a characteristic property of transition metals?
Which of the following elements melt above 1273 K – a characteristic property of transition metals?
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Solution
The correct options are
B Titanium
C Chromium
Except for Silver and Zinc, the other given metals melt above 1000 degrees Celsius. Do note that barring the exceptions, all the transition metals have high melting points (usually above 1273 K). This is because of the extensive metallic bonding made possible by the presence and number of d electrons. Other factors that affect the melting and boiling points are – enthalpy of atomization and lattice energy! In general, transition metals tend to have higher melting and boiling points.
As can be expected from exceptions, Zn Cd and Hg all melt at lower than 1273 K. Lanthanum also is similar in this regard.
B Titanium
C Chromium
Except for Silver and Zinc, the other given metals melt above 1000 degrees Celsius. Do note that barring the exceptions, all the transition metals have high melting points (usually above 1273 K). This is because of the extensive metallic bonding made possible by the presence and number of d electrons. Other factors that affect the melting and boiling points are – enthalpy of atomization and lattice energy! In general, transition metals tend to have higher melting and boiling points.
As can be expected from exceptions, Zn Cd and Hg all melt at lower than 1273 K. Lanthanum also is similar in this regard.
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