Radioactive Decay

Radioactive Decay

Nuclear Reactions and the Law of Conservation

• Reactants --> products

• what is a reaction?

• What is the LoC? How does it apply here?

• Conserve = same total mass

Multiple Choice

In the symbol ²⁰⁶₈₂Pb what does 206 stand for?

• Mass number
• Atomic number
• Atomic mass
• Number of protons

Multiple Choice

The process of the production of lighter nuclei from heavier nuclei is called

• mass energy
• magneticism
• fusion
• fission

Multiple Choice

When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element....

• remains the same
•   decreases by one.
• increases by one.
• increases by two.

Multiple Choice

The process of the production of lighter nuclei from heavier nuclei is called

• mass energy
• magneticism
• fusion
• fission

Multiple Choice

A helium nucleus with two protons and two neutrons is called a(n) ____.  

• alpha particle
• electroscope
• beta particle
• gamma ray

Fusion & Fission

• Heavy elements...

• Light elements...

• Where and why does this happen?

• Nuclear Reactors

Multiple Choice

The splitting of a nucleus into smaller nuclei is

• fusion
• fission
• decay
• gamma radiation

Multiple Choice

Two or more nuclei combine to form one larger nucleus in the process of nuclear _____.

• Fusion
• Fission
• Tracing
• Decay

Radioactive Decay Examples

• Beta Negative (⁰_-1e)

• Beta Positive (less common ⁰₁p)

• reactants --> products (total mass same)

• 
  

In the equation, ¹⁴₆C --> ¹⁴₇N + ⁰_-1B,

Multiple Choice

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

• Radioactive
• Beta
• Alpha

Multiple Choice

Solve this equation for beta decay.
₂₇⁶⁰Co = ___ + _-1⁰e

• ₂₅⁵⁶Mn
• ₂₈⁶⁰Ni
• ₂₃⁵⁸V
• ₂₇⁵⁹Co

Multiple Choice

Solve this equation for beta decay.
₆¹⁴C = ___ + _-1⁰e

• ₄¹⁰Be
• ₇¹⁴N
• ₂¹⁰He
• ₆¹³C

Multiple Choice

What is the symbol for an alpha particle?

• ⁴₂He

• ⁰_-1e

• ⁰₊₁ e

• ¹₀n

Multiple Choice

Solve this equation for alpha decay.
₈₅²⁰⁹At = ___ + ₂⁴He

• ₈₃²⁰⁵Bi
• ₈₆²⁰⁹Rn
• ₈₁²⁰⁷Tl
• ₈₅²⁰⁸At

Multiple Choice

Solve this equation for alpha decay.
₈₈²²⁶Ra = ___ + ₂⁴He

• ₈₆²²²Rn
• ₈₉²²⁶Ac
• ₈₄²²⁴Po
• ₈₈²²⁵Ra

Multiple Choice

Gamma rays have a _____ charge

• 0
• +1
• -1
• +2

Multiple Choice

Balance the following equation:
¹⁴₆C --> ⁰_-1e + ________

• ¹⁴₅B
• ¹⁴₆C
• ¹⁴₇N
• ⁴₂He

Multiple Choice

If Gadolinium-150 goes through alpha decay, the resulting element has a new atomic mass of _____.

• 150
• 148
• 146

Multiple Choice

If we start off with element ⁵⁰₂₄X after an gamma decay we get an element(product) that looks like...

• ⁵¹₂₄X

• ⁵⁰₂₃X

• ⁵⁰₂₄X

• ⁵⁰₂₅X