Which of the following sets of quantum numbers (n, l, ml, and ms) describes the valence electron of Na?

• 2, 1, 0, -½

• 2, 0, 0, -½

• 3, 1, 1, +½

• 3, 0, 0, +½

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following sets of quantum numbers (n, l, ml, and ms) describes the valence electron of 4s1?

• 2, 0, 0, +1/2

• 2, 1, 0, +1/2

• 4, 0, 0, +1/2

• 4, 1, 1, +1/2

Tags

NGSS.HS-PS1-1

Which of the following sets of quantum numbers (n, l, ml, and ms) describes the electron 3p6?

• 3, 1, 0, - 1/2

• 3, 1, -1, -1/2

• 1, 2, -1, -1/2

• 1, 3, -1, -1/2

There may be a maximum of ____ p orbitals at a given energy level.

• 2

• 6

• 3

• 8

Which of the following best describes quantum entanglement?

• Particles that are entangled can communicate faster than light.

• Entangled particles remain connected such that the state of one instantly influences the state of the other, regardless of distance.

• Entangled particles are always in the same location.

• Entangled particles cannot be separated.

Imagine you are tasked with explaining the concept of quantum entanglement to a group of high school students. Design a simple experiment or demonstration that illustrates the principles of quantum mechanics, including the materials needed and the expected outcomes.

• Use polarized sunglasses and laser pointers to demonstrate how entangled photons react similarly, even when separated, illustrating non-local interactions.

• Drop two balls of different masses from the same height to demonstrate gravity's effect, comparing it to classical mechanics without addressing quantum principles.

• Use a double-slit experiment setup with a laser and a screen to show wave-particle duality, explaining how it leads to the concept of superposition but not directly addressing entanglement.

• Create a computer simulation of the solar system to demonstrate orbital mechanics, focusing on large-scale phenomena rather than quantum-level interactions.

Answer explanation

Using polarized sunglasses and laser pointers to demonstrate entangled photons illustrates non-local interactions, aligning with the principles of quantum mechanics.

Tags

DOK Level 4: Extended Thinking

What is the fundamental difference between the Bohr model of an atom and the quantum mechanical model? Select all that apply.

• Bohr model considers electron to be a particle; quantum mechanics considers it to be a wave.

• Bohr model describes electron with 1 quantum number; quantum model uses 4 quantum.

• Bohr model describes electrons in orbits; quantum model describes electrons in orbitals.

In the quantum mechanical model of the atom, where are electrons most likely to be found?

• Moving in fixed orbits around the nucleus

• Embedded within the nucleus

• In specific regions called electron clouds or orbitals

• Uniformly distributed around the nucleus

Whose model is based on the Uncertainty Principle?

• Schrodinger / Heisenberg

• Bohr

• Rutherford

• Thomson

In the quantum-mechanical model of the atom, an orbital is defined as a

• region of the most probable proton location.

• region of the most probable electron location.

• circular path traveled by an electron around an orbital.

• circular path traveled by a proton around an orbital.

Answer explanation

In the quantum-mechanical model of the atom, an orbital is defined as a region of the most probable electron location.