What is the name of this molecule?
A. Butane
B. Butene
C. Propene
D. Propane

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So the main goal for the elements is stability which is a complete/full valence shell and typically the magic number for a stable element is 8 valence electron but not always. so elements to the left of the periodic table tend to be way less stable then those on the right, so the elements on the left are much more reactive.

Heat is how much heat energy something has and temperature is a measure of how hot something is.