which metal is A? why is it a metal. can't it be hydrogen.? no spam!
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A can be any metal of group 1 except oxygen... this can be concluded from given things....
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krishnakant8544:
kuch bhi matlab.. oxygen is in group 1…? bhai bhai..
i think he meant hydrogen.
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nice question.. but it's sodium it's also has valency 1+ and it forms NA2O..
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it can also be potassium.. or lithium..
but my question was - why not hydrogen~
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