How to calculate a mass of a sample with the molar mass, and the amount of moles of a sample. ex. SeCl4; molar mass = 220.77 g/mol) is known to contain 0.0733 moles of chlorine atoms. What is the mass of this sample in grams?

Hydrogen is the most abundant element on the periodic table..hope it .

The answer is a its density hope i

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.