A problem solving technique that compares the current problem to be solved with a similar problem an individual has solved in the past. A. Rule-of-thumb heuristic

B. Analogy heuristic

C. Planning heuristic

D. Representativeness heuristic

Afraidsugar lol it’s the third one

Fine out your self ponk

It starts to rust i think

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.