Beryllium

Beryllium, magnesium, calcium, strontium, barium and radium are alkaline earth metals.

In examining a large number of minerals for helium, Strutt found that some samples of beryl, a beryllium aluminium silicate, contain a relatively very large amount of helium, but only traces of thorium, and were altogether inactive.

The scientists used different kinds of atoms in their experiments. The American team used laser beams to teleport the properties of an atom of beryllium, a kind of metal. The team in Austria used a calcium atom. All the atoms were ions. This means they had an electric charge.