IMPORTANT QUESTION ON METAL , AND METALLOIDS ( you want to know but don't know)


1) Most abundant metal in earth crust : aluminium.


2)2nd most abundant metal in earth crust : iron .

3) most abundant element in universe : hydrogen .


4) Most abundant element in human body:  oxygen.


5) Most abundant mineral in human body : calcium .


6)Most abundant metalloids found in earth crust : silicon crust.


7) Rarest element in earth crust : Astatine.


8) Haviest metal in earth crust  : Osmium .


9) Haviest element in earth crust : Uranium .


10) lightest metal in earth crust : Lithium .

11) Lightest element in earth crust : Lithium 


12) hardest metal : platenum


13) Cobalt -60 is used to treatment of cancer .


14) Light emitted in firefly is due to burning of white phosphorous .


15) excess eating of chocolate is harmful due to Nickel & lead present in it .    

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