______________ 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
Alkaline earth metals
________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.