If the 1^st energy level is already filled up with 2 electrons, what level should be filled up next?

• Second

• Third

• Fourth

• Fifth

Tags

NGSS.HS-PS1-1

According to Pauli Exclusion Principle, how many electrons may occupy a single orbital?

• 1

• 2

• 4

• 8

“An electron should occupy the lowest energy level first before the higher energy level” is stated in what rule?

• Hund's rule

• Pauli Exclusion Principle

• Aufbau Principle

• All of the above.

What rule states that single electrons must occupy each equal-energy orbital before additional electrons can occupy the same orbitals.

• Hund's rule

• Pauli Exclusion Principle

• Aufbau Principle

• None of the choices.

What is the electron configuration of Argon?

• 1s² 2s² 2p⁶

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3s²

• 1s² 2s² 2p⁶ 3s² 3p⁶

Tags

NGSS.HS-PS1-1

Which of the following electron configurations is CORRECT?

• 1s² 2s³

• 1s² 2s² 2p⁶

• 1s² 2s² 3s²

• 1s² 2s² 2p⁶ 3s² 4s²

Tags

NGSS.HS-PS1-1

This is the most complete and current model of the atom. It consists of 61 elementary particles. Electrons are located in complex orbitals.

• The "Quantum Mechanical Model" of the atom

• The "Rutherford Model" of the atom

• The "Plum Pudding Model" of the atom

• The "Bohr Model" of the atom

Tags

NGSS.HS-PS4-3

What can you conclude from the fact that scientists continue to update the atomic model?

• New information about atoms continues to be discovered

• Old information about atoms is completely useless

• Scientists did not have any information about atoms until a few years ago

• Scientists still have no idea what atoms look like

Tags

NGSS.HS-PS1-8

Which of the following has the atomic models in the correct Chronological order?

• Solid sphere, Plum pudding, Nuclear, Planetary, Quantum Mechanic/Electron Cloud

• Solid sphere, Plum pudding, Nuclear, Quantum Mechanic/Electron Cloud, Planetary,

• Plum pudding, Nuclear, Planetary, Quantum Mechanic/Electron Cloud,Solid sphere

• Nuclear, Planetary, Solid sphere, Quantum Mechanic/Electron Cloud,Plum pudding,

What model of the atom replaced Bohr's model?

• Heisenberg's model

• Thomson's model

• Rutherford's model

• Quantum Mechanical model

Tags

NGSS.HS-PS4-3