Question

Write the number of periods and groups present in the Modern periodic Table.​

Answer 1

Explanation:

• There are 7 periods and 18 groups in the modern periodic table.

Answer 2

Answer:

There are 7 periods and 18 groups in the modern periodic table.On moving from left to right in a periodic table, the metallic character of elements decreases.

Metals have a tendency to lose electrons. In a period, atomic size decreases so it becomes difficult to remove the electrons of the outermost shell.