This is actually a very good article. It's funny they missed the minus on the value of e (1.6x10^19 C). But it's a very intuitive explanation of the point they'

This is actually a very good article. It's funny they missed the minus on the value of e (1.6x10^19 C). But it's a very intuitive explanation of the point they're making and a nice way to introduce the wider concepts!