Chemistry help!? need urgent!

Posted on 2016-06-01 19:00:00 in Chemistry by CAMERYN

I have a really hard time in chemistry and I tried to answer as many as I could. If someone could let me know if the answers I have are correct and let me know the rest, that would be great! (Fill in the blank answers are in parenthesis)
1. The element Oxygen has (8) protons, (8) electrons, and (8) neutrons. 
2. The element Oxygen has (8) valence electrons and will gain (2) electrons to have a full outer shell and be (stable). 
3. When making compounds, oxygen will (_________) (_________) electrons which gives it a (_________) charge. Once O has a charge it is called an (_________) . 
4. Some atoms of Oxygen have a mass of 15 amu which means they still have 8 (_________) (because that amount never changes in an element) and have only (_________) neutrons and are therefore called (_________).

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