Vision (Definition) Vision is a feature of a person's brain that allows him to see. He must have normal eyes, optic nerves (that stretch from the eyes to the back of his brain), and visual cortex (the vision center in the brain), in order to see properly. An ophthalmologist is a doctor specializing in vision. ...Read more.
The halogens or halogen elements (/ËhÃ¦lÉdÊÉn, ËheÉª-, -loÊ-, -ËdÊÉn/) are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The artificially created element 117 (ununseptium) may also be a halogen.
The stabilizing effects of this interaction. can produce highly inert compounds, which can pose a problem for waste management. Hydrodehalogenation is. a sub-field of hydrogenation chemistry where a halogen is effectively replaced with hydrogen and has. significant applications in many of the same areas as basic hydrogenation. -Conclude systematic survey of reduction in simple aromatic halides.