What is the energy in ev required to excite the electron from n=1 to n=2 state in hydrogen atom?
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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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Answer:
10.2e.v
Explanation:
energy =13.6×(1/(n1)sq.-1/(n2)sq
by putting into the equation ,..
E= 13.6×( 1/1sq.-1/2sq.)
=13.6×3/4
=10.2e.v.
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