Alpha Particles
Beta Particles
Gamma Rays
Radioactive Decay
Half-life
100
a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
What is an alpha particle
100
high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei
What are beta particles
100
penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei.
What are gamma rays
100
other names for radioactive decay
What is nuclear decay or radioactivity
100
The time taken for the radioactivity of a specified isotope to fall to half its original value.
What is a half-life
200
I discovered alpha particles
Who is Ernest Rutherford
200
I discovered beta particles
Who is Henri Becquerel
200
another name for gamma rays
What is gamma radiation
200
Is the process by which a nucleus of an unstable atom loses energy by emitting ionizing radiation
What is radioactive deay
200
We discovered that every radioactive isotope has a specific half-life.
Who is Rutherford and Soddy
300
number of protons in an alpha particle
what is two
300
occurs in isotopes
What is beta decay
300
I discovered gamma radiation
Who is Paul Villard
300
activity, of a radioactive substance is know as what
What are rates of decay
300
Number of half-lives elapsed: 1 Fraction Remaining: 1/1 Percentage Remaining:?
What is 100%
400
The charge of an alpha particle
What is positive
400
Atoms which undergo beta decay are located below the what
What is the line of stable elements on the chart of the nuclides
400
gamma rays' ionizing ability is called the exposure
What is the measure of gamma rays
400
The half-life, The decay constant, The mean lifetime
What are constant quantities.
400
Number of half-lives elapsed:? Fraction Remaining:1/32 Percentage Remaining:3.125%
What is 5 half-lives
500
identical to a helium nucleus having two protons and two neutrons. It is a relatively heavy, high-energy particle, with a positive charge of +2 from its two protons. Alpha particles have a velocity in air of approximately one-twentieth the speed of light, depending upon the individual particle's energy.
What are properties of an alpha particle
500
electrical charge of -1a mass of 549 millionths of one atomic mass unit
What are properties of a beta particle
500
absorbed by materials with high atomic numbers and high density,
What are the propetries
500
In 1898, we gave radioactive decay its name
Who is Marie and Pierre Curie
500
Number of half-lives lapsed: 7 Fraction remaining:? Percentage Remaining: 0.781
What is 1/28
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