QUANTUM MECHANICAL MODEL

An s orbital is shaped like a _____________, and a p orbital is shaped like a ________________.

• flower; leaf

• square; pyramid

• cylinder; cone

• sphere; dumbbell

According to the Aufbau principle, how do electrons fill the energy levels?

• from highest to lowest energy.

• from lowest to highest energy.

• from f to s levels.

• randomly.

The angular momentum quantum number, l, describes

• the shape of the orbital.

• the distance from the nucleus.

• the spin of the electron.

• the number of electrons contained in an orbital.

Electrons are described by quantum numbers. The principal quantum number, n, describes an electron's

• shape.

• main energy level.

• velocity.

• charge.

What is the total number of energy levels used by an atom of aluminum
(Al, atomic #13) in the ground state?

• 3
• 7
• 13
• 0

Tags

NGSS.HS-PS1-1

How many orbitals are available to hold electrons in the 6th energy level (n=6)?

• 9

• 16

• 26

• 36

According to the Aufbau Principle, which sublevel should starting filling with electrons after 5s?

• 6s
• 5p
• 4d
• 3f

Tags

NGSS.HS-PS1-1

The second energy level (n=2) contains a total of 5 electrons...how many more electrons can fit in the 2nd energy level?

• 0
• 3
• 5
• 7

Tags

NGSS.HS-PS1-1

Which of the following statements is true about the 3s and the 4s sublevels?

• These sublevels have the same energy
• These sublevels are the same distance from the nucleus
• These sublevels hold different amounts of electrons
• These sublevels have the same shape

Which of the following quantum number sets is not allowed?

• { 3, 2, +1, -1/2 }
• { 5, 3, -1, +1/2 }
• { 12, 1, +2, +1/2 }
• { 7, 6, -5, -1/2 }