Nuclear Chemistry Review

Alpha particles have...

• A negative charge and zero mass

• A negative charge and almost no mass

• A positive charge and a 4 AMU mass

• No charge and no mass

Tags

NGSS.HS-PS1-8

An atom of ⁶⁹Zn undergoes beta decay.  What will the resulting isotope be?

• copper-69

• nickel-65

• gallium-68

• gallium-69

Tags

NGSS.HS-PS1-8

An atom of Uranium-237 undergoes alpha decay.  Give the name (element-#) of the daughter isotope produced.

(a)  

Tags

NGSS.HS-PS1-8

When an atom undergoes alpha decay, the mass number ____________________ and the atomic number _____________.

• stays the same; increases by 1

• stays the same; stays the same

• decreases by 2; decreases by 2

• 
  decreases by 4; decreases by 2

Tags

NGSS.HS-PS1-8

The half-life of cadmium-109 is 464 days. A scientist measures out a 256.0 gram (g) sample. Approximately how many grams of cadmium-109 would remain after 1,392 days?

• A. 32.0 g

• B. 64.0 g

• C. 2,048.0 g

• D. 1,024.0 g

Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

• Alpha

• Beta

• Gamma

Answer explanation

Gamma radiation has the highest penetrating power, capable of passing through the human body and thick barriers like lead or concrete.

Colorless, odorless gas that is a naturally occurring decay product of uranium

• asbestos

• radon

• lead

• carbon monoxide

• formaldehyde

How do radioisotopes change over time?

• They gain stability and stop emitting radiation.

• They remain unchanged but move to a higher energy state.

• They spontaneously change into other isotopes.

• They dissolve into subatomic particles.

Tags

NGSS.HS-PS1-8

It involves a change in the nucleus which can produce a different element.

• Nuclear Reaction

• Chemical Reaction

Tags

NGSS.HS-PS1-8

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle

• beta particle

• gamma ray

• uranium