Question

which among this has more metallic character and why
what is the balance of each element
which is smaller and why

Answer 1

(a).y element has more mettalic character because as we move along a period from left to right the mettalic character of elements decreases.
(b).the valency of element x is -2 and the valency of element y is 2.
(c). element x is smaller in size because as we move along a period from left to right the electron is added to same shell the shielding effect remains same the power of nucleus get increased to bind the electrons .so,the size get smaller