Which mineral is found at Aluva and Chavara in Kerala, Manavalakurichi in Tamil Nadu and Chatrapur in Orissa ?
Thorium.
Who is generally considered as the inventor of the 'Periodic Table',a tabular method of displaying the chemical elements ?
Dmitri Mendeleev.
Average lifespan of a human platelet (thrombocytes) is normally 5 to 9 days.
Limestone is a sedimentary rock.
Oct 1: Int. Day of Older Persons.
