He atomic mass of an element is equal to its mass number its atomic number one-twelfth of the mass of a carbon-12 atom the mass of an "average atom" the mass of the heaviest isotope

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.