NEET Chemistry Periodic Table MCQ Question
Based on the provided NCERT context, if the average atomic weight of a triad of elements is calculated, which of the following triads would have an average atomic weight closest to the atomic weight of the middle element?
Li, Na, K
Ca, Sr, Ba
Cl, Br, I
Be, Mg, Ca
Correct Answer
Detailed Explanation
The atomic weights of Li, Na, and K are 7, 23, and 39 respectively, and the average of 7 and 39 is 23, which is the atomic weight of Na, the middle element.
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