Chapter 7

The most prominent line in the emission spectrum of chromium is found at \(425.4 \mathrm{nm}\). Other lines in the chromium spectrum are found at \(357.9 \mathrm{nm}, 359.3 \mathrm{nm}\) \(360.5 \mathrm{nm}, 427.5 \mathrm{nm}, 429.0 \mathrm{nm},\) and \(520.8 \mathrm{nm}\) (a) Which of these lines represents the most energetic light? (b) What color is light of wavelength \(425.4 \mathrm{nm} ?\)

What are two major assumptions of Bohr's theory of atomic structure?

Bohr pictured the electrons of the atom as being located in definite orbits about the nucleus, just as the planets orbit the sun. Criticize this model.

Light is given off by a sodium- or mercury-containing streetlight when the atoms are excited. The light you see arises for which of the following reasons? (a) Electrons are moving from a given energy level to one of higher \(n\) (b) Electrons are being removed from the atom, thereby creating a metal cation. (c) Electrons are moving from a given energy level to one of lower \(n\)

What does "wave-particle duality" mean? What are its implications in our modern view of atomic structure?

Which of these are observable? (a) position of an electron in an \(\mathrm{H}\) atom (b) frequency of radiation emitted by \(\mathrm{H}\) atoms (c) path of an electron in an \(\mathrm{H}\) atom (d) wave motion of electrons (c) diffraction patterns produced by electrons (f) diffraction patterns produced by light (g) energy required to remove electrons from H atoms (h) an atom (i) a molecule (j) a water wave

In principle, which of the following can be determined? (a) the energy of an electron in the \(\mathrm{H}\) atom with high precision and accuracy (b) the position of a high-speed electron with high precision and accuracy (c) at the same time, both the position and the energy of a high-speed electron with high precision and accuracy

A Suppose you live in a different universe where a different set of quantum numbers is required to describe the atoms of that universe. These quantum numbers have the following rules: \(N,\) principal \(1,2,3, \ldots, \infty\) \(I_{7}\) orbital \(\quad=N\) \(M,\) magnetic -1,0,+1 How many orbitals are there altogether in the first three electron shells?

Explain why you could or could not measure the wavelength of a golf ball in flight.