Exam 12: Quantum Mechanics and Atomic Theory

Consider the following portion of the energy-level diagram for hydrogen: -The ionization energy for a hydrogen atom is 1.31 × 10⁶ J/mol. What is the ionization energy for He⁺?

Write the electron configuration for the following: -N

Which of the following electron configurations is correct?

The ionization energies, in kcalories, for Mg and Ca are a) Indicate the reasons for the relatively high third ionization energy for magnesium. b) Indicate the reasons for the difference between the first ionization energies for Mg and Ca. c) Predict the third ionization energy for calcium.

Identify the order that is observed experimentally for direct reactions between the solid alkali metals and nonmetals.

How many electrons can be described by the quantum number n = 3?

Consider the following portion of the energy-level diagram for hydrogen: -For which of the following transitions does the light emitted have the longest wavelength?

Which of the following is a reasonable criticism of the Bohr model of the atom?

Place the elements Ge, S, and Ne in order of increasing atomic radius.

A photographic film needs a minimum of 80.0 kJ/mol for exposure.The frequencies of visible light are in the range 7.5 × 10¹⁴ Hz to 4.3 × 10¹⁴ Hz. Is the radiation visible to the human eye?

How many unpaired electrons are there in an atom of sulfur in its ground state?

Which form of electromagnetic radiation has the shortest wavelengths?

Which element has the greatest second ionization energy?

How many of the following electron configurations for the species in their ground state are correct?

How many valence electrons do the alkaline earth metals have?

How many electrons can be described by the quantum numbers n = 6, l = 2, m_l = 1, m_s = 1?

Consider an atom traveling at 1% of the speed of light. The de Broglie wavelength is found to be 3.31 × 10^-3 pm. Which element is this?

How many electrons can be contained in all of the orbitals with n = 4?

An atom of fluorine contains 9 electrons. How many of these electrons are in p orbitals?

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -[Xe] 4f¹⁴6s²5d¹⁰6p²