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Chlorine-at-room-temperature, chlorine is a chemical element with the symbol cl and atomic number 17. the second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. chlorine is a yellow-green gas at room temperature. it is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron .... Physical and chemical properties chlorine is a greenish yellow gas at room temperature and atmospheric pressure. it is two and a half times heavier than air. it becomes a liquid at −34 °c (−29 °f)., hydrochloric acid (hcl) was known to the alchemists. the gaseous element itself was first produced in 1774 by carl wilhelm scheele at uppsala, sweden, by heating hydrochloric acid with the mineral pyrolusite which is naturally occuring manganese dioxide, mno 2.a dense, greenish-yellow gas was evolved which he recorded as having a choking smell and which dissolved in water to give an acid solution..

It is in the gaseous state. the boiling point of chlorine is -34.4 degrees celsius, therefore at room temperature of about 20-23.5 degrees celsius, it is a gas. "chlorine" is sometimes used..., the cl 2 gas is a major toxic pollutant at room temperature and generally used in waste water treatment, pharmaceutical production, pesticide, and paper manufacture technologies,..

Room temperatureis usually taken as being 25°c. at this temperature, fluorine and chlorine are gases, bromineis a liquid, and iodine and astatine are solids. there is therefore a trend in state from gas to liquidto solid down the group., at room temperature the common allotrope of chlorine, cl2, is in the gas state. it has a melting point of -101.5°c and a boiling point of -34.04°c. it has a low boiling point as the only intermolecular forces between its molecules are van der waals forces as it is non-polar..

Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure.the chemical symbol for hydrogen is h. with a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. its monatomic form (h) is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass., chlorine | cl2 | cid 24526 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards .... Chlorine is a yellow-green gas at room temperature. chlorine has a pungent, irritating odor similar to bleach that is detectable at low concentrations. the density of chlorine gas is approximately 2.5 times greater than air, which will cause it to initially remain near the ground in areas with little air movement.