Question

Electrons with a kinetic energy of 6.023 x 10^4 J/mol
are evolved from a surface of a metal, when it is
exposed to radiation of wavelength 600 nm. The
minimum amount of energy required to remove an
electron from the metal atom is?






please answer explain
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Answer 1

Answer:

Explanation:

1mol=6⋅023×1023atoms

KEof1mol=6⋅023×104J

or KEof6⋅023×1023atoms

=6.023×104J

∴KEof1atom=6.023×1046.023×1023

=1.0×10−19J

hvenergy=hcλ=6.626×10−34×3×108600×10−9

=3.313×10−19J

Minimum amount of energy required to remove an electron from the metal ion (ie. Threshold energy)

=hv−KE

=3.313×10−19−1.0×10−19

=2.313×10−19J