To find out how much bigger one object is than another, divide the larger value by the smaller. Molecules are made from between 2 and several hundred atoms, so they are larger than the atoms which ...

It started with a short in-class question. If you know the mass of one mole of platinum and the density of platinum, what is an estimate for the diameter of one platinum atom? Of course, this ...

In the half-century since the transistor was invented, this workhorse component of almost every electronic device has shrunk from the size of a pencil eraser to smaller than a bacterium. The ...