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Which of the following combinations of quantum numbers (n, l, ml, ms) do not represent permissible solutions for the electron in the hydrogen atom (i.e., which combination of quantum numbers is not allowed)?

Determine the molecular geometry of the SiH2Br2 molecule. No need to show work, but you must try this on paper before selecting the correct answer. Place Si in the center and the other 4 atoms (H and Br) around Si.

The absorption of light of frequency 1.16 × 1011 Hz is required to excite CO molecules. Determine the energy for this transition in kJ/mol. (h = 6.626 × 10-34 J ∙ s   and Avogadro’s number is 6.022 × 1023 /mol )

Consider the Lewis structure shown below. What molecular geometries are possible for C atoms?

How many sigma (s) bonds are present in the molecule shown below?

Which one of the following molecular geometries is not possible for a molecule that shows an angle of 180° degrees?

Which of the following molecules is not planar?

Which of the following bonds is least polar (including nonpolar)?

Consider the Lewis structure of 1-butene molecule:   Specify the hybridization of the first two carbon atoms (C-1 and  C-2).

Consider the Lewis structure shown below. The hybridization of the central atom is _____.