Iron [26Fe], a metal in the first transition series, is one of the most ubiquitous and abundant elements existing in the inner and outer core of the Earth. Iron has sixteen oxides and hydroxides; two stable oxidation states in an aqueous solution of ferrous, Fe(II), and the ferric, Fe(III)[1]. Iro...
The solutions formed from soluble ionic compounds are good conductors of electricity. ... They are non-conductors of electricity in both the solid and liquid states and the aqueous solutions of some compounds are weak conductors of electricity however few compounds in aqueous solution are good conductors of electricity. ...
In offices, homes, and other indoor areas, poor air quality can both cause health problems and make existing health problems worse. The U.S. Environmental Protection Agency currently ranks indoor air pollution as one of the top five threats to public health. Indoor air pollution results from the rel...
From around 400 million years ago aqueous plants were able to migrate onto the now-protected land and evolve into terrestrial plants, followed by animal life that ate the plants. ... At first sight, the solution to this particular global environmental change appears to be unusually simple: a substitution of particular industrial and agricultural gases for others. ...
