Chemical properties – argon symbol, electronic configuration, density




Argon is the third most common gas in the Earth’s atmosphere. It is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily non-reactive substances become reactive. It also has uses in incandescent and fluorescent lighting, and other types of gas discharge tubes. It makes a distinctive blue-green gas laser.

Chemical Properties.

Appearance Colorless gas
Atomic Number 18
Atomic Weight 39.948 g/mol
Block p
Boiling Point −185.85 °C
CAS Number 7440-37-1
Class 2.2
Crystal Structure Face-centered cubic
Density 1.784 g/l
EINECS Number 231-147-0
Electron Configuration 1s2 2s2 2p3s2 3p6
Group 18
Ionization Energy 1520.6 KJ/mol
Melting Point −189.35 °C
Period 3
RTECS Number CF2300000
Symbol Ar

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Chemical properties – Chlorine symbol, electronic configuration, density



Chlorine is a halogen, found in the periodic table in group 17. As the chloride ion, which is part of common salt and other compounds, it is abundant in nature and necessary to most forms of life, including humans. In its elemental form under standard conditions, chlorine is a powerful oxidant and is used in bleaching and disinfectants, as well as an essential reagent in the chemical industry. As a common disinfectant, chlorine compounds are used in swimming pools to keep them clean and sanitary. It is also used in making plastics, solvents for dry cleaning and metal degreasing, textiles, agrochemicals and pharmaceuticals, insecticides, dyestuffs, household cleaning products, etc.

Chemical Properties.

Appearance Pale Yellow-Green Gas
Atomic Number 17
Atomic Weight 35.453 g/mol
Block p
Boiling Point -34.04 °C
CAS Number 7782-50-5
Class 2.3
Crystal Structure Orthorhombic
Density 3.2 g/l
EINECS Number 231-959-5
Electron Configuration 1s2 2s2 2p6 3s2 3p5
Group 17
Ionization Energy 1251.2 KJ/mol
Melting Point -101.5 °C
NFPA 704 H-4,F-0,R-0,C-OXY
Oxidation State 7,6,5,4,3,2,1,-1
Period 3
RTECS Number FO2100000
Symbol Cl
Synonyms Chlorine Gas


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Chemical properties – Sulfur symbol, electronic configuration, density



Sulfur is an abundant, multivalent non-metal. It is an essential element for all life, and is widely used in biochemical processes. In metabolic reactions, sulfur compounds serve as both fuels and respiratory materials for simple organisms. It is an important part of many enzymes and also in antioxidant molecules like glutathione and thioredoxin. Organically bonded sulfur is a component of all proteins, as the amino acids cysteine and methionine. Disulfide bonds are largely responsible for the mechanical strength and insolubility of the protein keratin, found in outer skin, hair, and feathers, and the element contributes to their pungent odor when burned. The element’s commercial uses are primarily in fertilizers, because of the relatively high requirement of plants for it, and in the manufacture of sulfuric acid, a primary industrial chemical. Other well-known uses for the element are in matches, insecticides and fungicides.

Chemical Properties.

Appearance Lemon Yellow Solid
Atomic Number 16
Atomic Weight 32.065 g/mol
Block p
Boiling Point 444.6 °C
CAS Number 7704-34-9
Class 4.1
Crystal Structure Orthorhombic
Density 2.07 g/cm3
EINECS Number 231-722-6
Electron Configuration 1s2 2s2 2p6 3s3p4
Group 16
IUPAC Name Sulfur
InChI 1/S
Ionization Energy 999.6 KJ/mol
Melting Point 115.21 °C
Molar Mass 32.06 g/mol
Molecular Formula S
Oxidation State 6,5,4,3,2,1,-1,-2
PG 3
Period 3
Symbol S

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