Question

A and B are the two salt which are responsible for the hardness of water exercise of metal x present in Salt a is larger than the size of metal by present in Salt B then which of the following element does not belong to the same period as metal why in the modern periodic table?
(1) Na
(2) K
(3) Al
(4) Cl​

Answer 1

Answer:

the answer is 2,k

Explanation:

Calcium and Magnesium salts are two salts which are responsible for the hardness of water. Since size of Metal X present in salt A is larger than the size of Metal Y present in salt B, Metal X must be Calcium and Metal Y must be Magnesium because as we go from top to bottom in a group of the periodic table, the size of the atom increases as the number of shells increases. Metal Y i.e. Magnesium belongs to the third period; but Potassium is the only one that belongs to the fourth period and not the third period. Therefore, K does not belong to the same period as that of Metal Y in the Modern Periodic Table

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Answer 2

Answer:

(2) K

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