The kinetic energy of the electron emitted when
light of frequency 3.5 x 1015 Hz is made to
strike on a metal surface having threshold
frequency 1.5 x 1015 Hz is
h = 6.6 x 10-34 J s) :
4) 1.32 x 10-18 J (B) 3.3 * 10-18 J
» 6.6 x 10-19 J (D) 1.98 x 10-19 J.
ne unpaired electron in an atom contributes
magnetic moment of 1.1 BM. The magnetic
pment for chromium (Z = 24) is :
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Answer:D
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