Khaara matti dhaatu

Wikipedia se

Khaara matti dhaatu , periodic table me ek element ke jhund hae. Ii sab Alkali dhaatu ke rakam hae lekin otna jaada reactive nai hae.

Khaara matti dhaatu hae: beryllium, magnesium, calcium, strontium, barium, aur radium. Radium radioactive hae.

The alkaline earth metals