Teaching Chemistry Through Riddles 2


Riddle # 2
I am a highly effective electron donor,
used in organic chemistry. You will find
my 3 constituent elements 
(2 metals & 1 non-metal) in the Ist , IInd and IIIrd periods of the periodic table. The non-metal one has some properties of alkali metal. In an organic compound having both C = C & carbonyl functional groups, I can selectively change one functional group
to a new one.

Questions
(a)  What  are my constituent elements ?
(b)  What is my name and formula ?
(c)   Which functional group can I change
       when both double bond and carbonyl
        groups are present in an organic
       compound ?
(d)  What is the new functional group formed ?      

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