Atomic Theory and Electron Configuration

 The diagram above represents two electrons with 

• a. opposite spins.
•  b. the same spin.
• c. different energies.
• d. different energy levels.

A photon is emitted from a gaseous atom when an electron moves to its ground state from a(n) 

• a. inner shell.
• b. excited state.
• c. n=0 state.
• d. less energetic state.

Tags

NGSS.HS-PS4-3

What is the correct electron configuration for a ground-state atom with 7 electrons? 

•  a. 1s² 2s² 2p³
•  b. 1s² 2s² 2p² 3s¹
• c. 1s² 2s³ 2p²
•  d. 1s² 2s⁵

Tags

NGSS.HS-PS1-1

What is the correct noble-gas notation for the electron configuration of an atom of chlorine? 

• a. [Ar]3s² 3p⁵
•  b. [Ne]3s² 3p⁴
•  c. [Ar]3s² 3p⁴
•  d. [Ne]3s² 3p⁵

Tags

NGSS.HS-PS1-1

What is the atomic number of the element with the noble-gas notation [Kr]5s¹ ? 

• a. 35
• b. 36
• c. 37
• d. 38

Tags

NGSS.HS-PS1-1

Which of the following types of electromagnetic radiation has the lowest frequency?

• a. x-rays
• b. infrared
• c. UV
• d. microwaves

Tags

NGSS.HS-PS4-4

 The electron configuration below represents a ground-state atom of which element? 
1s² 2s² 2p⁶ 3s² 3p⁴

• a. Se
• b. O
• c. S
• d. Si

Tags

NGSS.HS-PS1-1

What is the total number of electrons needed to fill the fourth main energy level? 

• a. 4
• b. 8
• c. 16
• d. 32

Which of the following requires that each of the p orbitals at a particular level have one electron before any of them can have two electrons? 

• a. Aufbau Principle
• b. Hund's Rule
• c. Pauli Exclusion Principle
• d. both a and c.

What rule states that an electron fills the lowest energy orbital first?

• a. Hund's Rule
• b. Pauli Exclusion Principle
• c. Aufbau Principle
• d. quantum theory