The diagram shows the different models of the atom that eventually led to the modern atomic theory.
Which model represents the current atomic theory based on our knowledge of the nucleus and electron cloud?

Model A
Model B
Model C
Model D

What is the typical rotational frequency frot for a molecule like n2 at room temperature (25∘c)? assume that d for this molecule is 1å=10−10m. take the total mass of an n2 molecule to be mn2=4.65×10−26kg. you will need to account for rotations around two axes (not just one) to find the correct frequency. express frot numerically in hertz, to three significant figures.