The radius of a hydrogen atom is 10 10 m. Number of hydrogen atoms necessary to have a length of one nanometre is :

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Q: 76 (CAPF/2015)
The radius of a hydrogen atom is 10 10 m. Number of hydrogen atoms necessary to have a length of one nanometre is :

question_subject: 

Science

question_exam: 

CAPF

stats: 

0,4,29,22,5,4,2

keywords: 

{'hydrogen atom': [0, 0, 0, 4], 'hydrogen atoms': [0, 0, 0, 3], 'radius': [0, 0, 2, 2], 'nanometre': [0, 0, 0, 1], 'length': [0, 0, 1, 0]}

To find the number of hydrogen atoms necessary to have a length of one nanometre, we need to consider the given radius of a hydrogen atom, which is 10^(-10) meters.

First, we need to convert the length of one nanometre to meters. One nanometre is equal to 10^(-9) meters.

To calculate the number of atoms, we divide the length (in meters) by the radius of each atom (in meters).

The calculation is as follows:

(10^(-9) meters) / (10^(-10) meters) = 10

So, 10 hydrogen atoms will be necessary to have a length of one nanometre.

Therefore, the correct answer is option 2, which states that 10 hydrogen atoms are required.