If there are more electrons than protons, the ion has a negative charge and is called an anion.Įlements are shown from atomic number 1 (hydrogen) up to 94 (plutonium). If there are more protons than electrons, an atomic ion has a positive charge and is called a cation. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The isotope is defined by the number of neutrons in an atom, which might be equal to the number of protons-or not.Īn ion of an atom is one in which the number of protons and electrons is not the same. Chlorine is a chemical element with atomic number 17 which means there are 17 protons in its nucleus. Therefore, the valency of chlorine is often considered to be 7. Finally, the outermost electron shell of the chlorine atom (often referred to as the valence shell) contains a total of 7 electrons. Remember, a neutral atom contains the same number of protons and electrons. The first electron shell belonging to chlorine contains a total of two electrons whereas the second electron shell of chlorine contains 8 electrons. The upper right side shows the number of electrons in a neutral atom. The element atomic number and name are listed in the upper left. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and. The final ring or shell of electrons contains the typical number of valence electrons for an atom of that element. Element Chlorine (Cl), Group 17, Atomic Number 17, p-block, Mass 35.45. Chlorine has an atomic number of 17 and an atomic mass of 35.45, meaning that an atom of chlorine consists of 17 protons, 17 electrons, and 18 neutrons. The electron shells are shown, moving outward from the nucleus. The only difference is the position of the chloro group chlorine atom 1,3 are also. Here are electron shell atom diagrams for the elements, ordered by increasing atomic number.įor each electron shell atom diagram, the element symbol is listed in the nucleus. Pentane (C 5 H 12) is an organic compound with five carbon atoms. For that, we have electron shell diagrams. The ratio observed in this case is 9:6:1.the compound containing 2 chlorine atom have difference in ratio due to isotopes attached with fragments. Chlorine gas has been used in the production of many solvents but it was not until 1915 during World War 1 that the german army used chlorine gas as a chemical weapon.It's easier to understand electron configuration and valence if you can actually see the electrons surrounding atoms. The organic compound having two chlorine atoms show three peaks due different combinations of isotopes of chlorine are attached with carbon and hydrogen. It has a melting point of -155°c and a boiling point of -100°c. It is located in Group 17 as a non metal yellow gas with a pungent smell familiar with swimming pools at room temperature. It took many years before Humphrey Davy concluded that the new gas discovered was a new element, he named it Chlorine after the Greek ‘Chloros’ meaning yellow green. Chlorine was first produced by Carl Wilhelm Scheele in 1774 when he reacted Manganese dioxide with hydrochloric acid, at the time he did not know the name of these chemicals and instead named them as the alchemical forms of pyrolusite and spiritus salis. Chlorine UN1017 Poison gas AKOS015915796 DB11109 MCULE-3583111150 Q1904422 3 Chemical and Physical Properties 3.1 Computed Properties 3.2 Experimental Properties 3.2.1 Physical Description Chlorine appears as a greenish yellow gas with a pungent suffocating odor. It is also used in the production of many plastics such as PVC and also the production of insecticides and solvents. It is used in swimming pools commonly and also making drinking water safe by killing bacteria. It is a non metal with the symbol Cl.Ĭhlorine much like other Halogens has antiseptic properties. It has the atomic number 17 in the periodic table and belongs in Group 17, the Halogens.
Chlorine (Cl) exists as a yellow green gas with a pungent smell.
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