Radioactive Decay flashcards

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what was Henri Becquerel discovery? he discovered that uranium crystals emitted rays that could expose and fog photographic plates
what else did Henri Becquerel propose? he proposed that uranium is unstable, also uranic rays
who changed the name of uranic rays to radioactive decay? Maric curie
what are radionuclides? they are unstable, radioactive isotopes
what is a beta particle? a beta particle is an electron emitted from an atomic nucleus
what is half life half life is the time required for half the amount of an atomic substance to decay
A nuclei undergoes alpha decay by emitting an _____ particle alpha
_____ occurs when a nucleus is in an excited energy state? Gamma decay
what is electron capture? this is when a nucleus captures one of the atom's own electrons, changing a photon to a neutron
what is alpha decay? this is a type of decay that occurs only with high Z nuclides
what is beta minus decay? this is a type of decay that occurs in neutron rich nuclides
what are gamma rays? gamma rays are energetic electromagnetic waves, they are emmitted in nuclear decay
what does radioactive mean? it means that they have a tendency to undergo spontaneously nuclear decay
what is a positron? a positron is a type of antimatter that is equivalent to an electron
what happens when a positron and an electron meet? they will annihilate one another in a burst of gamma rays
beta minus is ______ of beta plus antiparticle
what is nuclide? it is a specific atom with a given number of protons and neutrons
what does "parent-daughter nuclides" describe? it describes a parent nuclide decaying to produce a daughter nuclide
The amount of radiation given off is known as the _____ of the sample activity
How is the radiation of a sample measured? using a Geiger counter
when the radioactive sample is present, the activity is?, higher

what was Henri Becquerel discovery?

what else did Henri Becquerel propose?

who changed the name of uranic rays to radioactive decay?

what are radionuclides?

what is a beta particle?

what is half life

A nuclei undergoes alpha decay by emitting an _____ particle

_____ occurs when a nucleus is in an excited energy state?

what is electron capture?

what is alpha decay?

what is beta minus decay?

what are gamma rays?

what does radioactive mean?

what is a positron?

what happens when a positron and an electron meet?

beta minus is ______ of beta plus

what is nuclide?

what does "parent-daughter nuclides" describe?

The amount of radiation given off is known as the _____ of the sample

How is the radiation of a sample measured?

when the radioactive sample is present, the activity is?,

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