Teething refers to the process of new teeth rising or erupting through the gums. Teething can begin in infants as young as 2 months of age, even though the first tooth usually does not appear until about 6 months of age. Some dentists have noted a family pattern of early, average, or late teethers.
noble metal. 1. any of a number of metals, as gold, silver, mercury, or platinum, that resist oxidation when heated in air, and solution by inorganic acids. But now, at the first and yet final trial, she is proved and found to be of noble metal. There was a noble metal collarâabout thirty-two, the size would have been, on the usual scale.
Noble Gases in Electron Configurations An atom's electronic configuration is the way its electrons are arranged in space based on their energies. The configuration is reflected in the element's position in the periodic table. Because noble gases are in the last column of the periodic table and have full valence shells, the electronic configuration of other elements can be written in terms of noble gases.