Chemistry
Chemistry, 11.03.2020 22:55, jackandryansis8572

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?

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One of the most common elements is Oxygen.

What are some of the characteristics of Oxyge...

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