"This web page shows the scale of a hydrogen atom. The diameter of a hydrogen atom is roughtly 100,000 times larger than a proton. Therefore, if we make a proton the size of the picture above, 1000 pixels across, then the electron orbiting this proton is located 50,000,000 pixels to the right (but could be found anywhere in the sphere around the proton at that distance). Your monitor displays 72 dots per inch (dpi), so you would need a monitor that is nearly 11 miles (17.5 km) wide to view the whole page! Go ahead and grab the scrollbar at the bottom of the page to get a feel for exactly how far away that is!"http://keithcom.com/atoms/scale.php
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