What is the maximum number of electrons that can be present in each principal energy level of hydrogen?

• 2n^2

• n^2

• 2n

• n

Identify the rule for building orbital diagrams that states each electron occupies the lowest energy orbital available.

• Pauli Exclusion Principle

• Hund's Rule

• Aufbau Principle

• Heisenberg Uncertainty Principle

Identify the rule that states a maximum of two electrons can occupy a single atomic orbital but only if the electrons have opposite spins.

• Hund's rule

• Pauli exclusion principle

• Aufbau principle

• Heisenberg uncertainty principle

Identify the rule that states single electrons with the same spin must occupy each equal-energy orbital before additional electrons with opposite spins can occupy the same orbitals.

• Pauli Exclusion Principle

• Hund's Rule

• Aufbau Principle

• Heisenberg Uncertainty Principle

A valence electron is:

• An electron in the outermost shell of an atom

• An electron in the innermost shell of an atom

• A proton in the nucleus of an atom

• A neutron in the nucleus of an atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many electrons are shown in each element’s electron-dot structure?

• 4

• carbon:

• 3

• gallium:

• 7

• calcium:

• 2

• iodine: