Sheets of bismuth, gallium, indium, tin and lead can now be made just a few atoms thick by crushing them at a high ...

Chemical reactions result from interactions between the electrons in two atoms. In Bohr's model, if an electron orbit is not ...

When two hydrogen atoms get close enough, the electron from each atom feels an attraction from the proton in the other atom's nucleus. This attraction pulls the atoms together. The electrons end up ...

Atoms combine and bond to each other to make molecules. A molecule is made up of a certain number and type of atom. For example, water (H 2 O) is always made from two hydrogen atoms and one oxygen ...

A split shot in a game of quantum billiards To determine how fast the collisions occur, the researchers in Regal's laboratory began their experiment by preparing exactly two rubidium atoms in an ...

In a particle diagram, atoms are represented by a single coloured circle. When atoms of two or more elements bond together, they make a compound. These clusters of strongly bonded atoms are called ...

Like ordinary water—H 2 0—each molecule of heavy water contains two hydrogen atoms and one oxygen atom. The difference, though, lies in the hydrogen atoms. In ordinary water, each hydrogen ...

In a particle diagram, atoms are represented by a single coloured circle. When atoms of two or more elements bond together, they make a compound. These clusters of strongly bonded atoms are called ...