What measure remains consistent no matter its location

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?

Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12