In hydrogen atom electron jumps from 3 to 2 energy level the energy released
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Soft metals like Pottasium & Sodiumare niether ductile nor malleable, so asliquid metal Mercury. Again brittlemetals are niether of the two like Cast Iron(general one). Gold is the most ductile & malleable of all know metals. Again Lead is a metal which is malleable but not ductile.
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