Unit 6 Ch 20- Radioactivity & Nuclear Reactions

_________ are nuclei that have the same number of protons but different numbers of neutrons

• isotopes
• transmutation
• radioactivity
• nuclear fusion
• tracer

_______________________is a positively-charged particle that is composed of two protons and two neutrons.

• alpha particle
• transmutation
• radioactivity
• isotopes
• nuclear fusion

_____________________ is a radioactive isotope that doctors use to locate molecules in an organism, commonly used to diagnose cancer.

• tracer
• transmutation
• radioactivity
• isotopes
• nuclear fusion

_________________________ attractive force that acts between protons and neutrons in an atomic nucleus.

• strong force
• transmutation
• radioactivity
• isotopes
• nuclear fusion

_________________________ is the process of changing one element into a different element.

• transmutation
• radioactivity
• isotopes
• nuclear fusion
• tracer

_________________________ is the process of 2 or more nuclei combining to form a nucleus of larger mass.

• nuclear fusion
• transmutation
• radioactivity
• isotopes
• tracer

___________________________ is the process of nuclei decaying and emitting matter and energy.

• radioactivity
• transmutation
• isotopes
• nuclear fusion
• tracer

___________________________ is a high-energy electron that is emitted when a neutron decays into a proton.

• beta particle
• transmutation
• radioactivity
• isotopes
• nuclear fusion

________________________ is a series of repeated fission reaction is caused by the release of additional neutrons in every fission.

• chain reaction
• transmutation
• radioactivity
• isotopes
• nuclear fusion

_____________________ is the amount of time it takes for half the nucleus in a sample of isotopes to decay.

• half-life
• transmutation
• radioactivity
• isotopes
• nuclear fusion