Question

Where in periodic table do we find :

i) elements classified as non-metal.

ii) elements forming negative ions.

iii) elements with high melting points.

iv) elements forming positive ions.

Answer 1

Negative ions are formed by non metals as they are electronegative in nature so 

i) the non-metals are found on right side of the periodic table

ii) the element forming negative ions are also found in right side.
iii) the higher melting points are found in left side of the table and at the bottom of the groups.
iv) the elements forming positive ions are metals and they are found in left and middle of the periodic table.