Ключевые слова: 6, 9, air, atmosphere, atom, atomic, atomic number, blue, c, carbo, carbon, carbon dioxide, chalcogen, chart, chemical, chemical elements, chemical name, chemistry, climate, co2, display, education, element, element symbol, elements, gas, global, gray, greenhouse, grid, illustration, name, nonmetal, number, o, oxidation, oxygen, periodic, periodic system, periodic table, perspective, raster, research, science, scientific, substance, symbol, table, tabular,