Ruby is an aluminum oxide crystal in which some of the aluminum atoms have been replaced with chromium atoms.

As with diborane, the molecules are connected by 2 3-center-2-electron bonds: the shared methyl groups bridge between the two aluminum atoms.

The monomer species AlMe, which has an aluminum atom bonded to three methyl groups, occurs at high temperature and low pressure.

We can therefore signify the electron distribution in the aluminum atom as 2,8,3.

In a vacuum, the hot aluminum atoms travel in straight lines.

Some get stopped, while some pass through without hitting any aluminum atoms.

In the naming of inorganic compounds it is a suffix that indicates a polyatomic anion with a central aluminum atom.

This high temperature heat treatment breaks the aluminum-oxygen bonds and the aluminum atom is expelled from the zeolite framework.

Its high ratio of silicon to aluminum atoms makes it more resistant to attack by acids than most other zeolites.

Huge amounts of electricity heat and separate the aluminum atoms.