What do the different colour heart emojis mean? Does a red , yellow , green , blue and violet emoji all mean the same thing according to you? Solitude4
1 The relative atomic mass, or atomic weight, of an element is the weighted average of the masses of the isotopes in the naturally occurring element relative to the mass of an atom of the carbon-12 isotope which is taken to be exactly 12.
The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Density (g cmâ3) Density is the mass of a substance that would fill 1 cm3 at room temperature. Relative atomic mass. The mass of an atom relative to that of carbon-12. This is approximately the sum of the number of protons and neutrons in the nucleus.