How many aluminum atoms can line up across a page?

[mathcoral]

The problem statement, all variables and given/known data
The radius of an aluminum atom is about 140 picometers. How many spherical aluminum atoms could line up across a page of paper?The paper's width is 21.59 cm. Converting to picometers, the width is 2.159 x 10¹¹ pm

I used the ratio of width of the page in picometers divided by the diameter of the aluminum atom

(2.159 x 10¹¹pm)/(280pm)

I got 7.71x10⁸ aluminum atoms.
I am not sure if this is the answer.

 

[topsquark]

The problem statement, all variables and given/known data
The radius of an aluminum atom is about 140 picometers. How many spherical aluminum atoms could line up across a page of paper?The paper's width is 21.59 cm. Converting to picometers, the width is 2.159 x 10¹¹ pm

I used the ratio of width of the page in picometers divided by the diameter of the aluminum atom

(2.159 x 10¹¹pm)/(280pm)

I got 7.71x10⁸ aluminum atoms.
I am not sure if this is the answer.

Looks good to me.

-Dan