Presenter: OK, let's make sense of all this with Mrs Roberts. Are elements made up of a mixture of different types of atoms? Teacher: No, elements are made of only one type of atom. So ...

Presenter: OK, let's make sense of all this with Mrs Roberts. Are elements made up of a mixture of different types of atoms? Teacher: No, elements are made of only one type of atom. So ...

Which atoms make up most of the stuff in the universe? About 98% of the mass of the universe is made up of only two types of atoms: hydrogen and helium. That’s because these two elements make up stars ...

Then show students the animated Snap Cube model of vinegar. Explain that the object of the game is to make molecules out of four types of atoms: oxygen, hydrogen, carbon, and nitrogen. To make a ...

A technology once feared too error-prone to underlie a quantum computer is hitting the big time.