Which is the best predictor of the radioactive nature of an isotope? the proton-to-electron ratio the neutron-to-proton ratio the neutron-to-electron ratio the electron-to-proton ratio

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

because if the tool that you are using is not balanced it there would be false mass.