Compared to the chalcopyrite, which property of galena is different?

What are the first three quantum numbers for the electrons located in subshell 2s?

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.

Mr. rose asked his student to draw a quadrilateral with four unequal sides. an example of this kind of quadrilateral