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Grade: 12th pass
        
For a non-metallic element its mass no.is 137 and has 74 neutrons in its nucleus. The anion derived from that isotope contain 54 electrons.Symbolof such atom is
19 days ago

Answers : (1)

Arun
15947 Points
							
Dear student
 
Such atom should be cesium
 
Hope it helps
In case of any query please geel frwe to ask
 
Regards
Arun (askIITians forum expert)
19 days ago
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