Sun is the primary source of energy.
There is 55 neutrons in Cesium-130.
Honestly, you can look at the notes you took and even look down some things in google to help u solve ur answer
Answer:
78% nitrogen
Explanation:
It has been long agreed upon that our atmosphere is highly abundant with nitrogen. Our atmosphere is composed of 78% nitrogen and then other gases follow such as 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with very small percentages of other elements.
