In 1913, a scientist named Henry Mosley discovered that the properties of elements rely partially on— A: their color
B: their atomic mass
C: the properties of electrons
D: their atomic size

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?