Chemistry
WAEC 2017
Which of the following arrangements indicates the correct decreasing order of ionization energy of period 3 elements?
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A.
Na, Al, P, Cl
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B.
Cl, P, Al, Na
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C.
Na, P, Cl, Al
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D.
Al, Na, P, Cl
Correct Answer: Option B
Explanation
As you move across a period, first ionization energy increases.
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