Question

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

Answer 1

On going down in a group of the periodic table , the metallic character of elements increases. ..This is because the tendency of an atom to lose electron increases on moving down in groups. ...
On going down in a group of the periodic table, the the non metallic character of ...element decreases because the tendency of an atom to gain electron decreases on going down ...
On moving from left to right in period, the metallic character decreases

Answer 2

Hey dear may this help you.........

----In the modern periodic table there are 7 periods and

                                                                  13 groups...

-----On moving left to right in a period the metallic character of elements decreases. This is because on moving left to right the nuclear charge increases due to gradual increase in the number of protons. This the valance electrons are pulled in more strongly by nucleus and it becomes difficult to loose electrons so the electropositive character decreases....

------On moving down the group the metallic character increases. This is because as one whole shell gets added as we move down the electrons move away from the nucleus which loosens the hold of nucleus on the electrons so the electropositive character increases...........

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