One of the most common elements is Oxygen.

What are some of the characteristics of Oxygen: the atomic number, the atomic mass, the number of protons, the number of neutrons, how many valence electrons and how many energy shells?

Explanation:

- The atomic number of Oxygen is 8.

- The relative atomic mass is approximately 16.

- It has 8 number of protons.

- It has  8 number of neutrons ( Atomic Mass - number of protons).

- Oxygen has 6 valence electrons.

- It has 2 energy shells, two electrons occupy the first energy shell while six    electrons occupy the second energy shell.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

i think slash and