What happens to the electo positive character of elements on moving from
top to bottom in a group
left to right in a period?

From top to bottom electropositivity increases

Left to right it reduces

Explanation:

Electropositivity is also known as metallicity. It is a measure of the tendency of atoms of an element to lose electrons. It is closely related to the ionization energy and indeed the electronegativity.

your parents i think this could be it

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).