When reading the periodic table, the atomic mass of magnesium is 24.31. What does this mean? A) Mg atoms have an average mass of 24.31 amu

B) All Mg atoms have a mass number of 24.

C) Mg has 24.31 protons and neutrons.

D) All Mg atoms have a mass of 24.31 amu.

B. a graduated substance

Deposition  is  change of state has the wrong energy change listed 

The surface of the water droplet is held together by the attraction between molecules. in order for water to flow more easily into these small spaces, you need to decrease its surface tension. you can do this by adding soap, which is a surfactant (a material that decreases the surface tension of a liquid).