1.

The radius of a hydrogen atom is 5.32 xx10^(-11) mand the radius of a proton at the centre is 1.5 xx 10^(-5)m. The ratio of the radius of the atom to the radius of proton is :

Answer»

`3.5 xx 10^(-6)`
`3.54 xx 10^(-6)`
`3.55 xx 10^(-6)`
`4 xx 10^(-6)`

Solution :`("RADIUS of atom")/(Radius of proton")= (5.32 xx 10^(-11))/(1.5 xx 10^(-5) )`
` = 3.5 xx 10^(-6) `
ANSWER is reported UPTO 2 significant figures as in 1.5


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