U7Q1 - Lewis Dot, Quantum Mech. and Configurations

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

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

Identify the following element:
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• nickel
• copper
• zinc
• gallium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

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

How many valence electrons are in an atom of sulfur?

• 2
• 4
• 6
• 8

Tags

NGSS.HS-PS1-1

How many unpaired electrons are in an atom of strontium? (atomic number 38)

• 0
• 1
• 2
• 3

Tags

NGSS.HS-PS1-1

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s², 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

Tags

NGSS.HS-PS1-1

How many electrons does a neutral atom of Si contain? (click to see image)

• 14
• 28
• 2
• 4

Tags

NGSS.HS-PS1-1