Exam 7: Atomic Structure and Periodicity

Consider the following portion of the energy-level diagram for hydrogen: n = 4 $\quad$ -0.1361 $\times$ 10^-18 J n = 3 $\quad$ -0.2420 $\times$ 10^-18 J n = 2 $\quad$ -0.5445 $\times$ 10^-18 J n = 1 $\quad$ -2.178 $\times$ 10^-18 J -For which of the following transitions does the light emitted have the longest wavelength?

Which of the following atoms or ions has three unpaired electrons?

__________ results when light is scattered from a regular array of points or lines.

Choose the atom or ion using a periodic table. -Larger atomic radius,Fe²⁺ or Fe³⁺

Which of the following is the highest energy orbital for a silicon atom?

Write the electron configuration for the following: -Ag

Spacing between atoms in a crystal is on the same order as the de Broglie wavelength of accelerated electrons.

From the following list of observations,choose the one that most clearly supports the following conclusion: a)emission spectrum of hydrogen b)the photoelectric effect c)scattering of alpha particles by metal foil d)diffraction e)cathode "rays" -Electrons in atoms have quantized energies.

The second ionization energy for calcium is smaller than the first ionization energy.