BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They generally increase from bottom to top.
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They generally increase from top to bottom.
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The generally increase from left to right.
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They generally increase from right to left.
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Detailed explanation-1: -Electronegativity increases across a period from left to right and decreases in a group from top to bottom. PP and SiSi belong to group 15 and group 14 respectively and 3rd period. Hence option (A) is correct.
Detailed explanation-2: -Thus, electronegativity is the transfer of electron from lower electronegative atom to higher electronegative atom. Therefore, the correct option is C.
Detailed explanation-3: -On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group. As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.
Detailed explanation-4: -Electronegativity increases as we move left to the right in the period because as we move across the period, the effective nuclear charge increases and the atomic size decreases. Therefore, the tendency to attract shared pairs of electrons increases, thereby increasing electronegativity.