Every year an ordinary person is exposed to 620 billion radiation on average. Radioactive receives the radiation dose from both natural and technical sources. The direct half of the annual radiation dose is the natural background radiation that exists in the environment. Most of…

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An important place in experimental chemistry is demonstration attempts. The observational perception of chemicals and phenomena allows students to master the basic theoretical concepts of chemistry, developing logical thinking, identifying the practical application of chemistry, helping to consolidate knowledge. The following experiments are…

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