Noble gas periods of the periodic table, the noble gases are exactly the members of group 18. Noble gases are typically highly unreactive except when under particular extreme conditions. The inertness of noble gases makes them very suitable in applications where reactions are not wanted. For example, argon is used in incandescent lamps to prevent the hot tungsten filament from oxidizing; also, helium is used in breathing gas by deep-sea divers to prevent oxygen, nitrogen and carbon dioxide (hypercapnia) toxicity. The properties of the noble gases can be well explained by modern theories of atomic structure: their outer shell of valence electrons
Sustainability at the University of British Columbia Sustainability at the University of British Columbia Climate change is now the most serious global environmental threat. Its potential impacts include global warming, sea level rise, and increased extreme weather events. Climate change is a direct consequence of elevated greenhouse gas concentrations in the atmosphere. Greenhouse gases are gases that trap heat in the atmosphere. Some examples include Carbon dioxide, Methane, and Nitrous oxide. They are emitted from fossil fuel burning. Electricity production generates the largest share of greenhouse gas emissions. Moreover, other sources include transportation, industry, and agriculture. These gases are said to make the planet warmer by “thickening