The answer is B) fills all the space in its container
Reactivity could be one also toxicity flammability ect
I think it is C because photosynthesis converts solar energy
7 protons means that N atom has 7 electrons
1st level can have only 2 e⁻, and we have left over of 7-2=5 e⁻, that will go on the second level.
B. 2,5
Rise over run. Just like you have set up. If you plotted the data points subtract (y2-y1)/(x2-X1)
