Exam 9: Chemical Reactions

The concept of the dual nature of light indicates that light acts sometimes like a(n) ______________ and sometimes like a(n) ______________.

In terms of energy levels of electrons, a potential well has

For a specific element, photons of how many different energies could be emitted by electrons in the n = 2 level as they return to the n = 1 level?

For a specific element, photons of how many different energies could be emitted by electrons in the n = 4 level as they return to the n = 1 level?

If the energy of n = 3 is -1.51 eV and that of n = 4 is -0.85 eV in a hydrogen atom, a transition from n = 3 to n = 4 will _______________ a photon with an energy of approximately ______________.

The most modern model of the atom is known as the ______________ model.

Who, in 1925, postulated that matter, as well as light, has properties of both waves and particles?

Calculate the frequency in hertz of photons of light with energy of 9.90 $\times$ 10^-19 J.

Wilhelm Roentgen discovered

Calculate the radius in nanometers of the orbit of a hydrogen atom's electron with n = 5.

The nuclear model of the atom is associated with

The term probability is associated with the model of the atom proposed by

When an electron is added to an atom, a(n) _______________ ion is formed.

Which phenomenon shows that quanta of light, or photons, exist?

Atomic physics deals mainly with phenomena involving which particles in atoms?

What is the energy of a photon with a frequency of 5.2 $\times$ 10¹⁴ Hz?

Tripling the frequency of a photon would ______________ its energy.

The "billiard ball model" of the atom is associated with a scientist named ______________.

Einstein won the Nobel Prize for explaining

When an electron changes from n = 3 to n = 2, a(n) ______________ is given off.