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Electromagnetic radiation and spectra

2 x I08 atoms of carbon are arranged side by side. Calculate the radius of carbon atom, if the length of this arrangement is 2.4 cm.


Let the radius of carbon atom = be r
 Then,   diameter =2r
 Number of atoms =2×108  Total length formed =2.4cm  2r×2×108=2.4  r=2.44×108=6×109Cm =6×1011m =60×1012m=60pm

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