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15 Cards in this Set

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  • Back
atomic number is?
atomic mass is?
number of protons
number of neutrons
what is the name of the force that holds the nucleus together?
strong nucleur force
what particle acts as nucleur cememnt?
neutrons
what are the names, symbols, and composition of all three types of radiation produced by an unstable nuclei?
alpha: helium (two protons, two neutrons)
beta: electrons (one electron)
gamma: photon of very short wave length, high energy
which type of nucleur radiation can not be bent by a magnetic force?
gamma
Write the nucleur notionation for each of the three types of isotopes of hydrogen.
1/1 H (protium)
2/1 H (deuterium)
3/1 H (tritium)
Who was the detector of radio activity?
Geiger counter
who did Geiger work with and on what experiment?
Ernest Rutherford, the discovery of the nucleus with the gold foil.
when radiation is given off..is it dangerous?
yes because it gives off a lot of energy.
when you have a radioactive particle give off what happens?
an element decays from one element to another.
how does it decay from one element to another?
it gives off a particle and it is moving really fast because it has a lot of kinetic energy. The particle has to collide with something in order to stop, and if it collides with your cells it can kill your cells, or cause them to malfunction (cancer).
Describe an alpha particle as much as you can:
- helium nucleus
when drawn (draw four cirlces, two protons, two neutrons, no electrons)
- this has a positive charge of two
describe a beta particle as much as you can:
- is an electron
(when drawn simply draw a circle with a negitive sign)
- this has a negitive charge of one.
Describe a gamma particle as much as you can:
- photon of a very short wavelength (so short human eyes cant see it)
(when drawn it is a sign wave with an arrow on it)
When does an atom change elements? when it emits an alpha, beta, or gamma particle?
when an atom emits an alpha or beta particle it changes elements. it does not change elements when it emits a gamma particle.