1.   In the Zartmann experiment a narrow beam of vaporised metal atoms is directed at a rotating cylindrical drum.

2.   As they rattle against the lattice of the metal atoms, the electrons lose some of their energy, and the vibration spreads and dissipates as heat.

3.   In an ordinary salt such as sodium chloride, the valence electron deserts its metal atom for a neighboring chlorine atom, turning it into a negative chloride ion.

4.   Metal atoms like zinc and aluminum are often present in trace amounts in such clouds.

5.   Normal metals are relatively soft because metal atoms can move past one another easily.

6.   Porphyrins are doughnut-shaped molecules that have a metal atom where the hole would be.

7.   The metal atom dictates the work they do.