The answer is an ENDOTHERMIC REACTION.
HOPE THIS HELPS!!!!!
Draw eight circles and nine more in a big circle = this represents your nucleus
draw eight electrons (since electrons = protons in neutral elements) outside of it (2 in one ring, then 6 in a second ring)
From your notation, it is phosphorus trichloride. Basically, there are three molecules of phosphorus chloride.
X is usually representing time so years, days, etc
<span>Cost and availability of fuel is a considerable factor when dealing with nuclear power. Fission requires an element that can be easily split in a particle accelerator, such as uranium or plutonium. Fusion, on the other hand, uses isotopes of hydrogen atoms, specifically deuterium and tritium, that can be obtained from ordinary water</span>