John Schreifels @GMU: How many sigma bonds (first) and how many pi bonds (second) are there in the compound drawn below? In this model there is a carbon where two lines intersect.

@X@user.full_name@X@ @GMU: Which is the correct electron configuration for Nb2- in its ground state?

John Schreifels @GMU: Which is the correct electron configuration for Ne in its ground state?

@X@user.full_name@X@ @GMU: What is the frequency of ultraviolet radiation if the wavelength is 33.09 nm? This length is about the size of an virus.

John Schreifels @GMU: Which element should have the lowest first ionization energy?

@X@user.full_name@X@ @GMU: What is the de Broglie wavelength of a baseball with a mass of 111.7 g traveling at a speed of 0.7387 m/s?

@X@user.full_name@X@ @GMU: Which of the elements given will have a big jump in the 7th ionization energy?

@X@user.full_name@X@ @GMU: Which is the correct electron configuration for Sc3+ in its ground state?

@X@user.full_name@X@ @GMU: Draw the lewis dot structure of ClF3. How many lone-pairs of electrons (first) and bonding pairs of electrons exist on the molecule ClF3?

@X@user.full_name@X@ @GMU: Which is the correct electron configuration for Cd2- in its ground state?