Size of an Atom


 
 
Concept Explanation
 

Size of an Atom

Atoms are extremely small—so small that we cannot see them even with powerful microscopes. The size of an atom is measured in a very tiny unit called a nanometer (nm).

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Sample Questions
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Question : 1

Identify the correct statement :

(a)  Hydrogen atom is the smallest atom and its radius is 0.1 nm.

(b)  1/109 m equals to  1nm.

(c)  1 nm equals to 10-9 m.

Right Option : D
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Explanation
Question : 2

Identify the correct statement :

(a)  Hydrogen atom is the smallest atom

(b)  Radius of Hydrogen atom is 10 nm.

(c)  1/109 m equals to  1mm.

(d)  1 nm equals to 10-9 m.

Right Option : D
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Explanation
Question : 3

What is the radius of Hydrogen atom ?

Right Option : C
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Explanation
 
 


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