1.   In this group of ions the carbon atom is surrounded by three oxygen atoms in a planar triangle.

2.   Is there a molecule that weighs the same as an oxygen atom?

3.   The clays consist of silica tetrahedra and the Octahedra contain magnesia surrounded by oxygen atoms and hydroxyl groups.

4.   The optimum proportions of hydrogen and oxygen are thus two hydrogen atoms per oxygen atom, exactly the same as in water.

5.   The remaining oxygen atoms simply accumulate in the atmosphere.

6.   These are usually cyclic molecules, containing carbon-carbon bonds and oxygen atoms of general formula.

7.   These silicate groups come together by sharing oxygen atoms to produce a variety of structures.

8.   It has a giant molecular structure with the silicon atoms covalently bonded to four oxygen atoms in a tetrahedral arrangement.

9.   And using liquid oxygen rather than gas means there are lots of oxygen atoms at the silicon surface.

10.   At about the same time, Dr. Sharpless produced similarly selective catalysts for a different type of reaction, which inserts oxygen atoms into a molecule.