Exam 28: Atomic Physics

The longest wavelength of a photon that can be emitted by a hydrogen atom,for which the initial state is n = 3,is closest to which one of the following values? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19 J)

Electrons are accelerated to a speed of 4.0 × $10^4$ m/s and are then aimed at a double-slit apparatus,where interference fringes are detected.If the electrons were replaced by neutrons,what speed must neutrons have to produce interference fringes with the same fringe spacing as that observed with the electrons? (h = 6.626 × 10^-34 J ∙ s,m_electron = 9.11 × 10^-31 kg,m_neutron = 1.675 × 10^-27 kg)

How many 2d electron states can an atom have?

According to the quantum mechanical model of the hydrogen atom,if the principal quantum number is n,how many different orbital angular momentum quantum numbers are permitted?

The principal quantum number n can have any integer value ranging from

Consider the Bohr model for the hydrogen atom.(c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10^-19 J,h = 6.626 × 10^-34 J ∙ s) (a)How much energy (in eV)is needed to cause a transition of the atom from the second excited state to the third excited state? (b)What wavelength photon just has enough energy to initiate the transition in (a)?

What is the wavelength of the photon emitted when a hydrogen atom which is in the initial state n = 4 transitions to the final state n = 2? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19 J)

In a hydrogen atom,a given electron has n = 7.How many possible values can ℓ have?

To which of the following values of n does the shortest wavelength in the Balmer series correspond?

A hydrogen atom is excited to the n = 11 level.Its decay to the n = 7 level is detected in a photographic plate.What is the wavelength of the light photographed? (c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10^-19 J,h = 6.626 × 10^-34 J ∙ s)

If a proton and an electron have the same speed,which one has the longer de Broglie wavelength?

How many values of the magnetic quantum number,m_ℓ,are possible if the orbital angular momentum quantum number is ℓ = 2?

Given that the binding energy of the hydrogen atom in its ground state is -13.6 eV,what is the energy when it is in the n = 5 state?

Which one of the following is the correct electronic configuration for carbon,which has 6 electrons?

Consider the Bohr model for the hydrogen atom in its second excited state. (a)Determine the binding energy (eV)of the atom. (b)What is the radius of the electron orbit,given that r₁ = 0.0529 nm? (c)How far is it from the next higher excited orbit?

If ℓ = 4,which one of the following is a possible quantum number for n?

What value of n corresponds to a wavelength of 91.7 nm in the Lyman series?

If the momentum of an electron is 1.95 × 10^-27 kg ∙ m/s,what is its de Broglie wavelength? (h = 6.626 × 10^-34 J ∙ s)

How many 3d electron states can an atom have?

Electrons emerge from an electron gun with a speed of 2.0 × 10⁶ m/s and then pass through a double-slit apparatus.Interference fringes with spacing of 2.7 mm are detected on a screen far from the double slit.What would the fringe spacing be if the electrons were replaced by neutrons with the same speed? (h = 6.626 × 10^-34 J ∙ s,m_electron = 9.11 × 10^-31 kg,m_neutron = 1.675 × 10^-27 kg)