What is the atomic mass of Beryllium?

Wagons/motorized vehicles

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.

In the question "in a solution of brine  (salt water), what is the  salt? " the correct answer is a solute. a solute is a component of a  solution  dissolved in the solvent.