Describe with reason how oxidising and reducing properties of element very along a period?

CO has both oxidising and reducing property-explain.

CO has both -oxidising and reducing property— explain.

State how oxidising and reducing properties change along the group of periodic table.

H_(2)O_(2) has both oxidising and reducing properties-why?

State two non periodic properties of element.

State how oxidising annd reducing property change along the group of a periodic table? Would you expect the first ionisation enthalpy of two isotopes of an element to same or different?

Describe with reason the variation of ionic radii along a period.

What do you mean by periodicity of properties of elements?

What is the cause of periodicity in properties of the elements?