Quantum Mechanics Quiz

A three-dimensional region around a nucleus where an electron may be found is called a(n)

• spectral line.

• electron path.

• orbital.

• orbit.

According to the quantum theory of an atom, in an orbital

• an electron's position cannot be known precisely.

• an electron has no energy.

• electrons cannot be found.

• electrons travel around the nucleus on paths of specific radii.

The quantum number that indicates the position of an orbital about the three axes in space is the

• principal quantum number.

• angular momentum quantum number.

• magnetic quantum number.

• spin quantum number.

How many quantum numbers are needed to describe the energy state of an electron in an atom?

• 1

• 2

• 3

• 4

The main energy levels of an atom are indicated by the

• orbital quantum numbers.

• magnetic quantum numbers.

• spin quantum numbers.

• principal quantum numbers.

The angular momentum quantum number indicates the

• orientation of an orbital around the nucleus.

• shape of an orbital.

• direction of the spin of the electron in its orbital.

• main energy level of an orbital.

What values can the angular momentum quantum number have when n = 2?

• 0, 1

• 0, 1, 2

An electron for which n = 4 has more ____ than an electron for which n = 2.

• spin

• particle nature

• energy

• wave nature

The set of orbitals that are dumbbell shaped and directed along the x, y, and z axes are called

• d orbitals.

• p orbitals.

• f orbitals.

• s orbitals.

A spherical electron cloud surrounding an atomic nucleus would best represent

• an s orbital.

• a px orbital.

• a combination of px and py orbitals.

• a combination of an s and a px orbital.