Question
Question: Which of the following set of elements can not be a triad ?...
Which of the following set of elements can not be a triad ?
A
Li, Na, K
B
B, Al, Ga
C
Be, Mg, Ca
D
Cl, Br, I
Answer
B, Al, Ga
Explanation
Solution
B, Al & Ga is not a triad because the atomic weight of Al is not equal to average atomic weight of 'B' and 'Ga'.