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A Soxhlet extractor has three main sections: a percolator (boiler and reflux) which circulates the solvent, a thimble (usually made of thick filter paper) which retains the solid to be extracted, and a siphon mechanism, which periodically empties the condensed solvent from the thimble back into the percolator.
118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
Colors of a single chemical in different solvents, under visible and UV light, showing how the chemical interacts dynamically with its solvent environmentIn addition to the generic definition offered above, there are several niche fields where the term "chemical substance" may take alternate usages that are widely accepted, some of which are outlined in the sections below.
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). It is an icon of chemistry and is widely used in physics and other sciences.
LeBron James sat out the Los Angeles Lakers' 107-98 victory over the Portland Trail Blazers on Sunday due to left foot soreness, the NBA career scoring leader's first missed game of the season.
Families of Israeli hostages held a rally in New York City's Central Park on Sunday, and called for President Biden and President-elect Trump to bring them home. "Seize the opportunity, seal the ...
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James Harden had 23 points and eight assists, Ivica Zubac had 16 points and 12 rebounds and the Los Angeles Clippers coasted to a 125-99 win over the Philadelphia 76ers on Sunday night. The 76ers ...