Half-Life & Radioactivity

Which are the applications of radioactivity in real life?

• medicine

• energy (electricity)

• agriculture

• all of the above

Tags

NGSS.HS-PS1-8

Nuclear power is the use of nuclear reactions to produce electricity. Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions. Presently, the vast majority of electricity from nuclear power is produced by nuclear fission of uranium and plutonium in nuclear power plants.

• uranium

• plutonium

• lead

• radon

Tags

NGSS.HS-PS1-8

What is a common use of radioisotopes in medicine?

• diagnostic imaging

• food preservation

• water purification

• construction

Tags

NGSS.HS-PS1-8

Which type of radiation is the most penetrating?

• Neutrons

• Alpha particles

• Beta particles

• Gamma rays

Which element is commonly used as a fuel in nuclear reactors?

• hydrogen

• carbon

• uranium

• iron

What is emitted during Alpha Radiation?

• A helium nuclei.
• A helium atom
• Gamma Rays.
• Positrons

Tags

NGSS.HS-PS1-8

Has the lowest penetrating power.  Can only penetrate 0.05 mm into the body and can be stopped by the skin.

• Alpha
• Beta
• Gamma
• Electron capture

Uranium 238 emits an alpha particle to become what nucleus?

• Thorium-234

• Thorium-239

• Thorium-236

Tags

NGSS.HS-PS1-8

What is the process in which an unstable atomic nucleus emits charged particles or energy or both?

• radioactivity

• oxidation

• decomposition

• none of the above

Tags

NGSS.HS-PS1-8

What is the term for atoms of the same element that have different numbers of neutrons?

• Isotopes

• Ions

• Molecules

• Compounds

Tags

NGSS.HS-PS1-8