Note that, each element may contain more isotopes, therefore this resulting atomic … Ar I Ground State 1s 2 2s 2 2p 6 3s 2 3p 6 1 S 0 Ionization energy 127109.842 cm-1 (15.759610 eV) Ref. M60b-1 … Argon was suspected to be present in air by Henry Cavendish in 1785. Argon is a chemical element in the 18 group of the periodic table. 10 Argon Facts . Atomic Number: 18: Atomic Radius: 188 pm (Van der Waals) Atomic Symbol: Ar: Melting Point:-189.34 °C: Atomic Weight: 39.95: Boiling Point:-185.85 °C: Electron Configuration: [Ne]3s 2 3p 6: Oxidation States: 0: The word "argon" means inactive, inert in Greek and refers to this gas in that it reacts with very few other elements in the periodic table. The chemical symbol for Argon is Ar.. Atomic Mass of Argon. Argon is a colorless, flavorless, odorless noble gas. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. A chemical element, often simply called an element, is a species of atoms which all have the same number of protons in their atomic nuclei (i.e., the same atomic number, or Z).. A popular visualization of all 118 elements is the periodic table of … Argon gas is used to fill conventional incandescent and fluorescent light bulbs. Argon (Ar, atomic number 18) is the third most common gas in the world, even more so than carbon dioxide. Argon is a noble gas with element symbol Ar and atomic number 18. It has eight electrons in the outer shell, which make it very stable and resistant to reactions. Know the Uses of Argon, Chemical Properties of Argon, Atomic Mass of Argon, & more at BYJU'S Argon is the third-most abundant gas in the Earth’s atmosphere, at … Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. Argon was the first noble gas to be discovered. VHU99 Ar II Ground State 1s 2 2s 2 2p 6 3s 2 3p 5 2 P° 3 / 2 Ionization energy 222848.3 cm-1 (27.62966 eV) Ref. Here is a collection of useful and interesting argon element facts. It is best known for its use as an inert gas and for making plasma globes. But it was discovered in 1894 by Lord Rayleigh and Sir William Ramsay. Unlike some other gases, it remains colorless even in liquid and solid form. This is a list of the 118 chemical elements which have been identified as of 2021. Number of Levels: 3: First Energy Level: 2: Second Energy Level: 8: Third Energy Level: 8 Name: Argon Symbol: Ar Atomic Number: 18 Atomic Mass: 39.948 amu Melting Point:-189.3 °C (83.85 K, -308.74 °F) Boiling Point:-186.0 °C (87.15 K, -302.8 °F) Number of Protons/Electrons: 18 Number of Neutrons: 22 Classification: Noble Gas Crystal Structure: Cubic Density @ 293 K: 1.784 g/cm 3 Color: Colorless Gas Atomic … Atomic mass of Argon is 39.948 u. Argon. 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