Q9 of 40 Page 1

Write the number of periods and groups in the Modern Periodic Table. How does the metallic character of elements vary on moving (i) from left to right in a period, and (ii) down a group? Give a reason to justify your answer.

There are 7 periods and 18 groups in the modern periodic table. Metallic character decreases from left to right across a period because as atomic size goes on decreasing so tendency to lose electrons decreases. But down a group metallic character increases as atomic size increases and tendency to lose electrons increases.


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