6.8 x 10⁻¹⁵
<h3>Further explanation</h3>
<u>Given:</u>
- The radius of nucleus = 1.0 x 10⁻¹³ cm
- The radius of hydrogen atom = 52.9 pm
<u>Question:</u>
The fraction of the space within the atom is occupied by the nucleus.
<u>The Process:</u>
<u>Step-1:</u> Converting the radius of hydrogen atom from pm to cm
From
, we prepare 
So, the radius of hydrogen atom is
<u>Step-2:</u> The relationship between the volume sphere and the cubic radius.
We need to assume that both the nucleus and the atom are spheres. 

has been crossed out.
Remember that the volume of spheres is proportional to the cubic radius.
<u>Step-3:</u> Determine the fraction
Let's substitute into fraction.



Therefore, fraction of the space in an atom occupied by the nucleus is equal to 
<h3>Learn more</h3>
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- The energy density of the stored energy brainly.com/question/9617400
Keywords: the single proton, that forms, the nucleus of the hydrogen atom, has a radius of approximately, 1.0×10−13 cm, 52.9 pm, fraction of the space, volume of sphere, cubic radius