1.

2 xx 10^(8) atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is 3.0 cm

Answer»

Solution :Total length = 3.0 cm
Total number of ATOMS ALONG the length `= 2 xx 10^(8)`
`:.` DIAMETER of each atom `= (3.0 cm)/(2 xx 10^(8)) = 1.5 xx 10^(-8) cm`
`:.` RADIUS of the atom `= (1.5 xx 10^(-8) cm)/(2) = 0.75 xx 10^(-8) cm = 0.075 xx 10^(-7) cm`
`= 0.075 xx 10^(-9) m = 0.075 nm`


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