Quantum Mechanical Model of the Atom

Who proposed that electrons are only found in specific, discrete circular orbits around the nucleus?

• Albert Einstein

• Erwin Schrodinger

• Ernest Rutherford

• Niels Bohr

If n = 3, what is the maximum number of electrons that can fit in this shell?

• 2

• 8

• 18

• 32

Tags

NGSS.HS-PS1-1

What is the difference in a 1s orbital and a 2s orbital?

• The shape of the orbital

• The size of the orbital

• The number of electrons it can hold

• None of the above

Which quantum number represents the shape of the orbital?

• principal quantum number

• azimuthal (angular momentum) quantum number

• magnetic quantum number

• spin quantum number

Which of the following values does NOT represent a valid electron?

• n=(2), l=(1), ml=(1), ms=(+1/2)

• n=(4), l=(2), ml=(-1), ms=(-1/2)

• n=(2), l=(0), ml=(0), m=(-1/2)

• n=(4), l=(2), ml=(-3), ms=(+1/2)

When atoms _____________ energy, their electrons move to higher energy levels. These electrons _____________ energy by emitting light when they return to lower energy levels.

• lose, absorb

• absorb, lose

• lose, lose

• absorb, absorb

Tags

NGSS.HS-PS4-3

Which quantum number represents the orientation of the orbital?

• principal quantum number

• azimuthal (angular momentum) quantum number

• magnetic quantum number

• spin quantum number

Heisenberg's Uncertainty Principle states that it is impossible to know both the ___________ and the __________ of a particle at the same time.

• velocity, position

• velocity, energy

• position, energy

• velocity, speed

What states that every orbital of a subshell must be singly occupied before any orbital can have a pair?

• Pauli exclusion principle

• Hund's rule

• Aufbau principle

• None of the above

This states that no two electrons will have the same 4 quantum numbers in an atom or molecule. The two electrons of the same orbital must have opposite spin states.

• Pauli exclusion principle

• Hund's rule

• Aufbau principle

• None of the above