Question

7. What happens to the
electropositive character of elements
on moving from left to right in a
periodic table?
O Increase
Decreases
First increases than decreases
First decreases than increases​

Answer 1

$\huge {\underline{\underline{\mathbf {\pink{Answer : - }}}}}$

★ Generally on moving from left to right in a period the electropositive character(metallic character) decreases.

REASON :-

While moving from left to right in a period the size of the elements gradually starts decreasing or remains same (because the electron is getting added to same shell everytime)When the size of the atom is less the Nucleus holds the outermost electron tightly(attraction between nucleus and valence electron) so that the removing of valence electron from the outermost shell becomes difficult. Hence , the elctropositivity of elements decreases on moving from left to right in a period

★ On moving from top to bottom in a group the electropositivity (metallic character) generally increases.

REASON :-

Size of atoms from top to bottom in a group increases.Since the electron gets added to different shells. Then the attraction of nucleus and outermost electron decreases.so the removing of electron from valence shell becomes easy. Hence , the electropositivity of elements increases on moving from top to bottom in a group.

NOTE :-

electropositivity is the tendency of an atom to lose electrons (forming positively charged ions) is called electropositivity. There are also many other factors which influence electropositivity (matallic character) of elements.