What does the electron cloud model describe
a. rapidly moving neutrons
b. rapidly moving protons
c. a standing wave of electron wavicles surrounding the nucleus
d. rapidly moving nucleus

Can someone me with 1 to 4 plz. fast

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.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: