Given an element’s atomic number and mass number, how can you tell the number of protons and neutrons in its nucleus?

Which is mostly likely why many scientists reject the cold fusion theory

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

What metric units would you use to measure the thickness of a key