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Question
The cause of diagonal relationship is:
The cause of diagonal relationship is:
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Solution
The correct option is D All the three.
On moving acrross a period of the periodic table the size of the atoms decrease and on moving down a group the size of the atoms increase.
Similarly, on moving along the period the elements become progressively more covalent, less reducing and more electronegative, whereas on moving down the group the elements become more ionic, more basic and less electronegative.
Thus, on both descending a group and crossing by one element the changes cancel each other out and the elements with similar properties which have similar chemistry are often found - the atomic size, electronegativity, properties of compounds (and so forth) of the diagonal members are similar.
Small size of atoms/ ions , high electronegativity and large charge/radius ratio (similar polarizing power) of ions are the main factors for diagonal relationship.
On moving acrross a period of the periodic table the size of the atoms decrease and on moving down a group the size of the atoms increase.
Similarly, on moving along the period the elements become progressively more covalent, less reducing and more electronegative, whereas on moving down the group the elements become more ionic, more basic and less electronegative.
Thus, on both descending a group and crossing by one element the changes cancel each other out and the elements with similar properties which have similar chemistry are often found - the atomic size, electronegativity, properties of compounds (and so forth) of the diagonal members are similar.
Small size of atoms/ ions , high electronegativity and large charge/radius ratio (similar polarizing power) of ions are the main factors for diagonal relationship.
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