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25 Cards in this Set
- Front
- Back
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Alpha Particle |
Positively charged particle emitteda from certain radioactive nuclei |
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Atom |
Smallest particle of a element |
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Atomic Mass |
Weighted average of the masses of the isotopes of an element |
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Atomic mass unit |
(Amu) unit of mass equal to one twelfth the mass of carbon-12 atom |
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Atomic number |
The number of protons in the nucleus of an atom of a element |
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Beta particle |
An electron resulting from the breaking apart of neutrons in an atom |
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Cathode ray |
A stream of electrons produced at the negative of a tube containing a gas at low pressure |
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Electron |
Negatively charged subatomic particle |
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Gamma rah |
High energy photon emitted by a radioisotope |
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Isotopes |
Atoms of the same element that have the same atomic number but different atomic masses due to a different number of neutrons |
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Mass number |
Total number of protons and neutrons in the nucleus of an atom |
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Neutron |
A subatomic particle with no charge and a mass of 1 amu |
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Neutron |
A subatomic particle with no charge and a mass of 1 amu |
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Nuclear equation |
Describes changes that occur during radioactive decay |
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Neutron |
A subatomic particle with no charge and a mass of 1 amu |
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Nuclear equation nucler |
Describes changes that occur during radioactive decay |
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Nuclear reaction |
A change that occurs in the nucleus of atoms |
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Nucleus |
Tiny, center part of a atom |
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Proton |
Positively charged subatomic particle |
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Proton |
Positively charged subatomic particle |
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Radiation |
The penetrating rays and particles emitted from a radioactive source |
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Proton |
Positively charged subatomic particle |
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Radiation |
The penetrating rays and particles emitted from a radioactive source |
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Radioactivity |
Emission of ionizing radiation or particles caused by the disintegration |
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Radioisotope |
Isotope that is radio active |
