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Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O? [NEET Kar. 2013]
  • a)
    Ca < Al < C < O < F
  • b)
    Al < Ca < O < C < F
  • c)
    Al < O < C < Ca < F
  • d)
    C < F < O < Al < Ca
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which one of the following arrangements represents the correct order o...
As the nuclear charge increases, the force of attraction between the nucleus and the incoming electron increses and hence the elecron gain enthalpy becomes more negative, hence the correct order is Ca   <   Al    <   C    <   O   <    F
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Most Upvoted Answer
Which one of the following arrangements represents the correct order o...
Option a is correct. Because, as we go on to the Modern Periodic table, electronegativity increases across the period and decreases down the group. As the Calcium and Aluminum are the metals, they donate the electrons. More number of added shells refers to the least negative electrons. Calcium having more number of shells than Aluminum. So, Calcium having the least negative electrons. Aluminium will be the second as it have a least number of shells. Next, Carbon, Oxygen and Fluorine.
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Which one of the following arrangements represents the correct order o...
B) O < f="" />< al="" />< c="" />< ca="" />
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Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O? [NEET Kar. 2013]a)Ca < Al < C < O < Fb)Al < Ca < O < C < Fc)Al < O < C < Ca < Fd)C < F < O < Al < CaCorrect answer is option 'A'. Can you explain this answer?
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