Which quantity tells you where the electron is likely to be found?

• The square of the wavefunction
• The sign of the wavefunction
• The slope of the potential term

What does the time independent equation say about a wavefunction?

• Its square gives the electric charge of the electron
• Kinetic plus potential terms acting on it give energy times it
• It traces the curved path the electron follows

An electron in an atom travels along a definite tiny path.

The square of a wavefunction is zero at some point. What does that mean?

• The electron is never found at that point
• The electron moves fastest through that point
• The wavefunction is broken and must be fixed

A proposed wavefunction gives two different values at the same point. What do you conclude?

• It is fine, since overlapping waves are normal
• It is acceptable as long as it still fades far away
• It is rejected, since it must be single valued

Why can a bound electron only have certain energies?

• Friction removes all the energies in between
• The nucleus absorbs every energy except a few
• Only certain wavefunctions satisfy the equation for the system

A candidate is smooth and single valued but grows without limit far from the nucleus. Is it acceptable?

• No, it must fade to zero far from the nucleus
• Yes, since growth shows a high energy state
• Yes, since continuity is the only rule that matters

A student says a wavefunction value of minus 0.3 at a point is impossible, since odds cannot be negative. What is the mistake?

• Nothing, the student is right about the minus sign
• The student confused the wavefunction with its square
• Minus signs are banned everywhere in quantum mechanics