Concept explainers
Interpretation:
The trends in melting point and the orbital configurations of the elements needs to be explained.
Concept introduction:
The number of proton which is found in nucleus of an atom of the element is termed as
Answer to Problem 90A
W, tungsten has the highest melting point and has half filled d orbital, mercury, Hg has lower boiling point and has full s and d orbital.
Explanation of Solution
The elements which orbital are half filled that elements have a higher melting point and stable. There is relation between solubility of substance and its melting point. To achieve most stable configuration d block elements can promote electrons from s block. In the period six, element W, tungsten has the highest melting point and have half filled d orbital. To give tungsten a half full shell, two electrons are promoted from s orbital to p orbital. Repulsive forces reduce the stability of elements and lower the melting point, as the number electron in orbital increases. Mercury, Hg has lower boiling point and has full s and d orbital.
The elements with half filled orbitals have a higher melting point and stable. Mercury, Hg has lower boiling point and has full s and d orbital. W, tungsten has the highest melting point and has half filled d orbital.
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Chemistry: Matter and Change
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