Chapter 4: Electron Configuration

 The diagram above represents two electrons with 

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

The electron configuration above violates 

• a. the Pauli exclusion principle. 
• b. the Aufbau principle. 
• c. Hund’s rule. 
• d. None of the above

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NGSS.HS-PS1-1

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.

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NGSS.HS-PS4-3

 What is the frequency of light whose wavelength is 633 nm? 

•  a. 4.74 x 10
  ⁴ Hz 
•  b. 4.74 x 10
  ² Hz 
•  c. 4.74 x 10¹⁴ Hz 
•  d. 4.74 x 10¹⁶ Hz 

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NGSS.HS-PS4-1

 What is the frequency of a photon whose energy is 3.4 x 10
^-19 J? (h = 6.626 x 10
^-34 J·s) 

• a. 8.8 x 10²⁶ Hz 
• b. 5.1 x 10¹⁴ Hz 
•  c. 1.9 x 10
  ^-15 Hz 
•  d. 2.3 x 10
  ^-52 Hz 

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NGSS.HS-PS4-1

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

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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

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

• a. 35
• b. 36
• c. 37
• d. 38

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NGSS.HS-PS1-1

 In which orbital(s) are all the inner-shell electrons located in an atom of magnesium that is in the ground state? 

•  a. 1s
•  b. 1s, 2s 
• c. 1s, 2s, 2p 
• d. 1s, 2s, 2p, 3s

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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

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