Noble gases
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The document discusses the properties and uses of noble gases. It defines noble gases as elements that do not interact with other elements due to their complete electron orbits. It lists the noble gases as helium, neon, argon, krypton, xenon, and radon. It then discusses their physical properties, including being odorless and colorless gases at room temperature with low melting and boiling points. Finally, it provides examples of uses for some noble gases, such as using helium for balloons due to its light weight and neon for lighting due to its bright white color.
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本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
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1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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1:该专业认证可证明留学生真实身份
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3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
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Noble gases
- 1. University of Garmian C0llage of Education- Evining Class Department of Chemistry First stage
- 2. Definition of gases Uses of gases
- 3. Is a group of chemical elements that do not interact with other elements in a manner General, because their electron orbits are complete and filled with electrons, including these
- 4. Helium, neon, argon, krypton, xenon, radon. These elements are in the eighth group of the periodic order and they form 0.93% of the atmospheric volume and 1.29% of its mass. It is called inertia because it does not interact with other elements ie it is inactive Chemically and metaphorically noble of it as the nobles do not confuse with the general any ordinary elements.
- 6. 1. Show as gases in room conditions. 2. No color and no smell. 3. Have 8 electrons equivalent. 4. Produce vehicles only in special circumstances. 5. It is drawn from the air in liquefaction and distillation. 6. Found in the form of single-atom gases. 7. Very weak internal attraction between their atoms. 8. It has very low melting and boiling grades.
- 7. Helium (He) It is used for balloons and balloons because it is lighter than air and does not burn or explode.
- 9. Used to mark flight paths and gas lamps because of the color of its light Bright White.
- 10. It is used as liquefied gas in lighting lamps, especially as it does not react with the glowing metal wire even at high temperatures.
- 11. Radon is highly flammable and carcinogenic by inhalation. Radon is used in the treatment of certain types of cancers.
- 12. Density Year of discovery Noble gases 0.1785 g / cm 3 1895Helium 0.899 g / cm 3 1898Neon 1.784 g / cm 3 1890Argonne 3.778 g / cm 3 1898Krypton 5.88 g / cm 3 1898Xenon