Nuclear Chemistry

The splitting of a nucleus into smaller fragments accompanied by the release of neutrons and a large amount of energy

• Fusion
• Fission
• Chain Reaction

It is the energy producing reaction that takes place in our sun and other stars.

• Fission
• Chain Reaction
• Fusion

Tags

NGSS.HS-ESS1-1

What makes something radioactive?

• an unstable nucleus

• elements with an atomic number above 81

• contaminated sewage

• it decays over time

Tags

NGSS.HS-PS1-8

How is nuclear fusion different from nuclear fission?

• In fusion, the product is a larger atomic nucleus.
• Fission produces energy but fusion does not.
• Fusion produces energy but fission does not.
• In fission, the product is a larger atomic nucleus.

In a nuclear reactor, electricity is produced from what element?

• Plutonium
• Uranium 235
• Radon 220
• Lead 232

Tags

NGSS.HS-PS1-8

The three types of nuclear radiation in order of increasing penetrating power are

• alpha, beta, gamma
• alpha, gamma, beta
• beta, alpha, gamma
• gamma, alpha, beta

Tags

NGSS.HS-PS1-8

a fission chain reaction is...

• when a U-235 atom absorbs a neutron then splits in half, releasing energy and 2-3 neutrons that then split the results of the U-235 atom, and again and again.
• when an alpha particle is released by fusion and then fuses with an omega molecule emitting heat and radiation.
• when a electron grows to be the size of an electron and splits a U-235 atom in two again and again.
• when a molecules is split by a proton and releases radioactivity that powers a turbine to release heat.

a fission chain reaction is...

• when a U-235 atom absorbs a neutron then splits in half, releasing energy and 2-3 neutrons that then split the results of the U-235 atom, and again and again.
• when an alpha particle is released by fusion and then fuses with an omega molecule emitting heat and radiation.
• when a electron grows to be the size of an electron and splits a U-235 atom in two again and again.
• when a molecules is split by a proton and releases radioactivity that powers a turbine to release heat.

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 strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

• 3.0g
• 0.25mg
• 0.3g
• 0.25g

Tags

CCSS.HSF.LE.A.4