When Ra Decays by Emitting an Alpha Particle, What

question 122

Multiple Choice

When Ra decays by emitting an alpha particle, what is the atomic number of the resulting nucleus? What is the resulting atomic mass?

• A)atomic number = 86; atomic mass = 222
• B)atomic number = 87; atomic mass = 226
• C)atomic number = 86; atomic mass = 224
• D)atomic number = 87; atomic mass = 224

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Definitions:

Jawless Fish

Fish with a skeleton of cartilage, no fins or jaws; a lamprey or hagfish.

Wiggling

Moving with short, quick movements from side to side or up and down, often seen in small creatures or as a way to adjust position.

Parasitic

Describes organisms that live on or in a host organism and cause harm to the host.