Quantum Mechanics

True or False: Electrons are considered stable at their ground state.

• TRUE
• FALSE

How many electrons does Si contain? (click to see image)

• 14
• 28
• 2
• 4

An orbital can at most hold how many electrons?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons

He unknowingly discovered the electron as a result of cathode ray tube experiments.    

• Thomson
• Chadwick
• Democritus
• Aristotle

What shape are "p" orbitals? 

• Cloverleaf shaped
• Spherical shaped
• Hybrid structure
• Dumbell shaped

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

• 1
• 2
• 3
• 4

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

How many orbitals in the d subshell? 

• 1
• 7
• 3
• 5

An orbital that can never exist according to the quantum description of the atom is

• 6d.
• 3f.
• 3d.
• 8s.

If electrons in an atom have the lowest possible energies, the atom is in the

• ground state.
• inert state.
• excited state.
• radiation-emitting state.