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

Which of the following is incorrect :

(a)  Hydrogen atom is the smallest atom.

(b) Helium atom is the smallest atom.

(c)  1 nm equals to 10-9 m.

Right Option : B
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Explanation
Question : 2

1/109 m equals to ______________.

Right Option : A
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Question : 3

What is the radius of Hydrogen atom ?

Right Option : C
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Explanation
 
 


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