What is the most common element in the universe?
Hydrogen's Big Party
What is the most common element in the universe?
Picture the whole universe — every star, every galaxy, every empty stretch of space. Now imagine all of it is made of tiny building blocks called elements. There are about a hundred kinds. And one of them is so common it makes everything else look rare. Its name is hydrogen.
Hydrogen is the simplest thing there is. One little center, called a proton, with one even tinier electron buzzing around it. That's the whole recipe. Nothing in the universe is built more simply than this.
