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Atomic Structure (The structure of an atom (atoms have radius of 1 x 10^…
Atomic Structure
The structure of an atom
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basic structure = positively charge nucleus composed of both proton s and neutrons surrounded by negatively charge electrons
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The electron arrangements may change with the absorption of electromagnetic radiation (move further from the nucleus; a higher energy level) or by the emission of electromagnetic radiation (move closer to the nucleus; a lower energy level)
Mass number, atomic number and isotopes
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atoms of the same element can have different numbers of neutrons; these atoms are called isotopes of that element
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Radioactive contamination: the unwanted presence of materials containing radioactive atoms on other materials
the hazard from contamination is due to the decay of the contaminating atoms. The type of radiation emitted affects the level of hazard
irradiation is the process of exposing an object to nuclear radiation. The irradiated object does not become radioactive
suitable precautions must be taken to protect against any hazard that the radioactive source used in the process of irradiation may present
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