Calculate the sum of "Code numbers" of all the cases in which correct order of the mentioned parameter is represented.
For example if Sr. No. (3) & (5) are correct your answer should be 59 + 14 = 73 therefore fill 73.00.

Question

Calculate the sum of "Code numbers" of all the cases in which correct order of the mentioned parameter is represented.

For example if Sr. No. (3) & (5) are correct your answer should be 59 + 14 = 73 therefore fill 73.00.

TestHub · Accepted Answer

Case 1 (Correct, Code 28): Electronegativity increases across a period and up a group ( $N a < Cl < F$ ).

Case 2 (Correct, Code 53): Metallic character increases down a group and from right to left ( $B e < M g < N a$ ).

Case 3 (Incorrect): For isoelectronic ions, size decreases with increasing nuclear charge ( $M g^{2 +} > A l^{3 +}$ ).

Case 4 (Correct, Code 8): Chlorine has the highest magnitude of electron gain enthalpy due to lower electron repulsion than fluorine ( $O < F < Cl$ ).

Case 5 (Incorrect): Non-metal oxides are acidic, so basic nature increases with metallic character ( $N a_{2} O > A l_{2} O_{3} > C l_{2} O_{7}$ ).

$T o t a lS u m = 28 + 53 + 8 = 89$

Chemistry - PERIODIC TABLE Question with Solution | TestHub

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