Which of the following is an example of a chemical change? 25 points

A. water evaporating
B. carbon joining with oxygen to form carbon dioxide
C. ice cream melting
D. salt dissolving into water to form a solution

You know how the first one if filled up like the objects do the same but with the other categories

You would do 1500/4 and the answer is 375

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.