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A section of the periodic table with all identification features removed is shown below. U V W X Y Z Which element has the lowest ionization energy?

What is the frequency, in Hz, of a photon having a wavelength of 620nm?

Showing all your work: a) Draw the Lewis structure of sulfur tetrabromide. b) Label the electron geometry and molecular geometry c) Determine if the molecule is polar or non polar. Explain your choice.

What is the wavelength, in nanometers, of a photon having a frequency of 4.7 x 1014 Hz?

What is the frequency, in Hz, of a photon having a wavelength of 420nm?

Which of the following compounds would be expected to have the smallest lattice energy?

What is the frequency, in Hz, of a photon having a wavelength of 420nm?

Draw an orbital diagram of the valence shell of niobium.

Describe the photoelectric effect.  What does it prove about the nature of light?

Draw the lewis structure of the ionic compound formed between sulfur and sodium. Don’t forget that you must show all your work.