Exam 40: All About Atoms

Electrons in a certain laser make transitions from a metastable state to the ground state.Initially there are 6 * 10²⁰ atoms in the metastable state and 2 *10²⁰ atoms in the ground state.The number of photons that can be produced in a single burst is about:

The ratio of wavelength of K _$\infty$ x-ray line for Nb (Z = 41)to that of Ga (Z = 31)is:

A laser must be pumped to achieve:

No state in an atom can be occupied by more than one electron.This is most closely related to the:

For any atom other that hydrogen and helium all electrons in the same shell have:

A group of electromagnetic waves might Which of these describe the waves from a laser?

The quantity s_z is related to the quantum number m_s by:

The total number of electron states with n = 2 and ℓ=1 for an atom is:

An electron in an L shell of an atom has the principal quantum number:

The quantity L_z is related to the quantum number m_ℓ by:

An atom is in a state with orbital quantum number ℓ=2.Possible values of the magnetic quantum number m_ℓ are:

An electron is in a quantum state for which the magnitude of the orbital angular momentum is .How many allowed values of the z component of the angular momentum are there?

The transition shown gives rise to an x-ray.The correct label for this is:

The figure shows two different orientations of a proton in a magnetic field.Which orientation is at higher energy?

Possible values of the principal quantum number n for an electron in an atom are:

Characteristic K x-radiation of an element is caused by: