Question

4) Calculate the frequency of light at 3 different wavelengths: 250, 400 and 550 nm; assume “c” = 3.0 x 10⁸ m s^-1, use the right units.

5) From the previous question, calculate the energy per photon for each wavelength of the electromagnetic spectrum: 250, 400 and 550 nm. Indicate the right units.

6) Similarly to the slide #39 of lesson #11, draw the diagram representing – only – the fourth level of orbitals, in this case, n = 4.

7) Write the electron configuration and orbital diagram of the element “oxygen” an inicate from the electron configuration the valence electrons. Is the oxygen atom dimagnetic or paramagnetic?

8) Draw the Lewis structures for the following molecules and ions. Include the lone electrone pairs:

NH₄⁺

H₂O

CO₂

SO₂

H₃O⁺

Answer 1