The digital data making up an image is stored in a file. The raw digital information for an image takes up a considerable amount of space. For example a 10 by 8 inch colour print scanned at 600 dpi (dots per inch) will result in about 85.5 Mb (Megabytes) of raw data.
Covalent bonding is a form of chemical bonding between two non metallic atoms which is characterized by the sharing of pairs of electrons between atoms and other covalent bonds.
Covalent bonding . One rule for predicting when an ionic bond will take place is when the difference between electronegativities is 1.7 or greater. In other cases atoms bond by sharing electrons on the valence shells. The force that holds two atoms together in this case is called a covalent bond. A covalent bond can be described as the mutual attraction that positive nuclei have for the shared, negatively charged bonding electrons.