Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. M60b-1 … But it was discovered in 1894 by Lord Rayleigh and Sir William Ramsay. Argon is a colorless, flavorless, odorless noble gas. Argon is a noble gas with element symbol Ar and atomic number 18. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. Argon (Ar, atomic number 18) is the third most common gas in the world, even more so than carbon dioxide. 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. 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 … 10 Argon Facts . Number of Levels: 3: First Energy Level: 2: Second Energy Level: 8: Third Energy Level: 8 Argon was suspected to be present in air by Henry Cavendish in 1785. The chemical symbol for Argon is Ar . Argon is a chemical element in the 18 group of the periodic table. Unlike some other gases, it remains colorless even in liquid and solid form. Argon is atomic number 18 on the periodic table, with the element symbol Ar. It is best known for its use as an inert gas and for making plasma globes. Atomic mass of Argon is 39.948 u. 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. Here is a collection of useful and interesting argon element facts. 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 … Note that, each element may contain more isotopes, therefore this resulting atomic … 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 was the first noble gas to be discovered. Atomic Number of Argon. 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 chemical symbol for Argon is Ar.. Atomic Mass of Argon. This is a list of the 118 chemical elements which have been identified as of 2021. Argon gas is used to fill conventional incandescent and fluorescent light bulbs. 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. Argon. 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