NORTHRIDGE, Calif. and BUFFALO, N.Y. — Helium, the second lightest element in the universe, has a variety of uses, from keeping balloons afloat to cooling superconducting magnets. It is also a noble ...

The questions in this quiz are suitable for GCSE chemistry students studying properties of ionic compounds, the ionic lattice and forming ions. If you struggled with the quiz, don't panic - we've got ...

Ionic bonds are formed between a metal and non-metal, for example sodium chloride. An atom of sodium will lose an electron and form a positive ion. An atom of chlorine will gain an electron and form a ...

Helium, a noble gas, was long believed to be 'too aloof' to react with the other elements on the periodic table. Now, however, scientists have provided a theoretical explanation of how helium may be ...