Define Sublimation....?
Answers
Sublimation is the transition of a substance directly from the solid to the gas state , without passing through the liquid state .
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★ The concept of allotropes was discovered by the scientist Jons Jakob Berzelius in 1841.
★ The property of some elements that exist in two or more different forms, in the physical state is known as allotropes of the elements.
★ Allotrope can also defined as, the various physical forms in which an element can exist.
★ Allotropes of a same element may show differences in chemical and physical properties.
★ In allotropes the occurrence of molecules contain different numbers of atoms with different atomic structure.
★ Allotropes occur only with certain elements, in Groups 13 through 16 in the Periodic Table.
★ For example :- Carbon has several different forms in which it exists.
There are 3 allotropes of carbon.
• Diamond
• Graphite
• Buckminsterfullerene