IB Topic 7

The energy levels for an atom are shown to scale. A photon of wavelength λ is emitted because of a transition from E3 to E2. Which transition leads to the emission of a photon of longer wavelength?

• A. E4 to E1

• B. E4 to E3

• C. E3 to E1

• D. E2 to E1

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

A proton, an electron and an alpha particle are at rest. Which particle has the smallest magnitude of ratio of charge to mass and which particle has the largest magnitude of ratio of charge to mass?

• A

• B

• C

• D

X is a radioactive nuclide that decays to a stable nuclide. The activity of X falls to 1/16th of its original value in 32 s.What is the half-life of X?

• A. 2 s

• B. 4 s

• C. 8 s

• D. 16 s

Tags

NGSS.HS-PS1-8

Which property of a nuclide does not change as a result of beta decay?

• A. Nucleon number

• B. Neutron number

• C. Proton number

• D. Charge

Tags

NGSS.HS-PS1-8

Which of the following atomic energy level transitions corresponds to photons of the shortest wavelength?

• A

• B

• C

• D

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

A radioactive nuclide with atomic number Z undergoes a process of beta-plus (β+) decay. What is the atomic number for the nuclide produced and what is another particle emitted during the decay?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-8

Which Feynman diagram shows the emission of a photon by a charged antiparticle?

• 
• 
• 
• 

Tags

NGSS.HS-PS4-3

In the equation, ¹⁴₆C --> ¹⁴₇N + ⁰_-1B, the _______ decay of radioactive carbon-14 results in the creation of a new nitrogen-14 atom.

• Gamma

• Beta

• Alpha

Tags

NGSS.HS-PS1-8

How is the alpha particle written in a nuclear equation?

• ^4₂He
• ^2₄He

Tags

NGSS.HS-PS1-8

In the nuclear equation below, calculate the mass number of the alpha particle. 
^238₉₂U-->^234₉₀Th + ^4₂He + 2^0₀

• 238
• 0
• 234
• 4

Tags

NGSS.HS-PS1-8