Introduction to Nuclear Chemistry

Arrange in order of increasing ability to penetrate matter.

• Beta, gamma, alpha

• Alpha, gamma, beta

• Gamma, beta, alpha

• Alpha, beta, gamma

Tags

NGSS.HS-PS1-8

NGSS.HS-PS4-5

This is an example of...

• Fission  reaction

• Fusion reaction

• Decomposition reaction

• Combustion

Tags

NGSS.HS-PS1-8

How do atoms with stable nuclei differ from atoms with unstable nuclei? Nuclei is the plural of nucleus.

• The number of particles in stable nuclei never changes; the number of particles in unstable nuclei does change 

• Stable nuclei contain equal numbers of protons and neutrons; unstable nuclei do not 

• Stable nuclei emit electrons; unstable nuclei emit protons and neutrons 

• Stable nuclei can be found everywhere; unstable nuclei do not occur in nature

This is an example of ---

• Radioactive Decay

• Nuclear Fission

• Nuclear Fusion

• Fossil fuel reaction

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

What is the half-life of a radioactive element?

• How old it is when it is middle aged

• The time it takes for half of the atoms to decay

• The time it takes for half of the atom to form

• How old it is when the Earth is middle aged

Tags

NGSS.HS-PS1-8

___________ occurs when an unstable nucleus emits energy through ionization radiation.

• Radioactive Decay

• Chemical Decay

• Isotope Decay

• Electron Decay

Tags

NGSS.HS-PS1-8

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

What is Half-life?

• The amount of time it takes for some of the nuclei in a sample of the isotope to decay

• The amount of time it takes for half the electrons in a sample of the isotope to decay

• The amount of time it takes for half the nuclei in a sample of the isotope to decay

• the amount of time it takes to double the nuclei in a sample of the isotope to decay

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