Question

Write the number of periods and groups in the modern periodic table what does the metallic character of the element vary on moving from left to right in a period and down in a group give reason to justify your answer

Answer 1

grp--->18

period--->7

metallic char Dec as we go left to right inthe grp

Answer 2

Periods: 7

Groups: 18

Metallic character:

Across the period:It decreases.

This is because the atomic size decreases and thus it prefers gaining of electrons as easier than losing of electrons.

Down the group: It increases.

This is because the atomic size increases and thus it prefers losing of electrons as easier than gaining of electrons.