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Each hole is the absence of an electron (a negatively charged particle) from an
atom in the solid, much as a bubble is the absence of liquid from an otherwise full
container. While a hole cannot be examined outside the solid, its motion inside ...
The crystal is made up of large numbers of sodium atoms lacking one electron (
positively charged sodium ions) and equal numbers of chlorine atoms with one
excess electron (negatively charged chloride ions) arranged in such a way that ...
Cis refers to the configuration (i.e., spatial arrangement of atoms) in which like
cups of atoms are located on the same stde of the molecule, whereas trans refers
to the configuration in which like groups are on opposite sides of the molecule.
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review