Question

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

Answer 1

The modern periodic table has
18 Groups
7 Periods

When we move left to right in a period the metallic character decreases as the number of electrons increase hence the effective nuclear charge increased. Thus the ability to lose electrons becomes less.

Down a group, metallic character increases as the shell level increases. So the electrons are further away from the nucleus and can be lost easily.

Answer 2

The modern periodic table has 18 groups and 7 periods.
On moving from left to right the electronegativity decreases and as we move down a group electronegativity increases