Question

identify the wrong sequence of the element in a group
A) ca,br, ba
B) cu, au, ag
C) cl, br, i

Answer 1

Cl,Br,I is the wrong sequence
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Answer 2

Answer: The wrong sequence of the elements in groups is (B). Cu, Au, Ag.

Explanation:

The correct sequence of the elements in groups is Cu, Ag, Au.

(A). In ca, br, i, the atomic number of calcium (cl) is 20, the atomic number of bromine (br) is 35, the atomic number of barium (ba) is 56.

So 20<35<56 it is correct.

(B). In cu, au, ag, the atomic number of copper (cu) is 29, the atomic number of gold (au) is 79, the atomic number of silver (ag) is 47.

So 47 is not greater than 79 it is incorrect.

(C). In cl, br, i, the atomic number of chlorine (ca) is 17, the atomic number of bromine (br) is 35, the atomic number of iodine (i) is 53.

So 17<35<54 it is correct.