Question

Write the number of periods and groups in the modern periodic table. How does the metallic characters of elements vary on moving
==== answer the following ====

(a) From left to right in a periodic table

(b) Write down a group
give reasons to justify your answer ​

Answer 1

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.

Answer 2

Answer:

periods=7

groups=18

a-Metallic character decreases as you move across a period in the periodic table from left to right. This occurs as atoms more readily accept electrons to fill a valence shell than lose them to remove the unfilled shell.

b- increases as the size of the atom increases along the group it can lose more electrons easily as the no. of shell increases...

hope this helps you and plz mark this answer as brainliest answer