Atomic Theories & Electronic Arrangement

This "rule" of Quantum Chemistry states that it is impossible to know both the position and velocity of an electron at the same time.

• Hund's Rule
• Heisenberg Uncertainty Principle
• Aufbau Principle
• Pauli Exclusion Principle

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

Identify the element whose electron configurations ends with 5p³

• As
• Te
• Sb
• Sn

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

This "rule" of Quantum Chemistry states that no 2 electrons in an atom can be in the exact same state...each electron in an atom can be described by a unique set of quantum numbers.

• Hund's Rule
• Heisenberg Uncertainty Principle
• Aufbau Principle
• Pauli Exclusion Principle

According to the Aufbau Principle, which sublevel should starting filling with electrons before the 3p sublevel?

• 3s
• 2p
• 4s
• 4p

Tags

NGSS.HS-PS1-1

How many valence electrons are in an atom of sulfur?

• 2
• 4
• 6
• 8

Tags

NGSS.HS-PS1-1

I am an element in the 3rd row of the periodic table...I have one unpaired electron in my last sublevel...I have 3 valence electrons...who am I?

• Na
• Al
• Cl
• Ar

Tags

NGSS.HS-PS1-1

An electron cloud

• represents a 50% probability of finding an electron
• has uniform density
• can be called an orbital
• can only show where the electron is not located