______________ react with water to form strong alkalies.

The properties which repeat themselves at regular intervals are called

Elements in the sixth period from cerium to lutetium are known as

_______________including alkali metals and alkaline earth metal are in the extreme left of the periodic table.

______are known as zeroth group elements

________is the ability of an element to exist in more than one form.

________________ are good reducing agents.

Second group elements are commonly known as

_____________ are good oxidising agents.

_________are placed in the upper right hand corner of the modern periodic law.