Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its dentist, electrical conductivity, and melting point. which statement best describes his investigation?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this