Familiar solutions can have a wide range of ph levels. according to the chart, which is the strongest acid, based on its ph level? lemon juice has approximately how many more times the h+ ions than tomato juice? which has the highest concentration of h+ ions: baking soda, ammonia, or bleach?

The answer is a) carbon-12

The answer is 4 i don't know if its right let me see.

The chlorine is the chemical property 

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.