Question

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.(All India - 2017)

Answer 1

Answer:

There are 18 groups and 8 periods in the modern periodic table.

1. Metallic character of elements decreases on moving from left to right in a period,as the no. of electrons in the last shell of an atom increases from left to right in a period.
2. Metallic character of elements decreases on moving down a group