Question

Calculate the de Broglie wavelength of an electron travelling with a speed equal to 1% less of the speed of light. Or Draw the electronic configuration of Cu,(Z=29), Cr(Z=24), Fe2+ (Z=26)​

Answer 1

λ=
p
h
​
=
mv
h
​


v=
100
1
​
×c=
100
1
​
×3×10
8
=3×10
6
m/s.

λ=
9.1×10
−31
×3×10
6

6.626×10
−34

​
=242pm

Hence, option C is correct.

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