Which one of the following statements explains the Aufbau Principal? (4 Points)

The electron must have a unique set of four quantum numbers.

The orbital can only contain two elecrons.

Electrons in atoms fill the lowest energy available atomic orbital.

The most stable electron configuration is the one that has the least number of electrons.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?