State the uses of Modern Periodic table.

1. Periodic table has been useful in predicting the existence of new elements.
2. It has been useful in the past in correcting the position of elements in relation to their properties.
3. Study of elements and their compounds has become systematic and easier to remember.
4. Position of an element in the periodic table reveals its:
   
   1. atomic number
   2. electronic configuration
   3. number of valence electrons
   4. properties
5. Nature of chemical bond, formula of compound formed and properties of that compound can all be predicted from the periodic table.
6. Position of an element in the periodic table reveals:
   
   1. valency of the element
   2. whether the element is a metal or a non-metal — metals occupy the extreme left positions of the periodic table while non-metals are at the extreme right of the periodic table.