Argon is a chemical element; it has symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. [10] Argon is the third most abundant gas in Earth's atmosphere, at 0.934% (9340 ppmv).

Argon is the 18th element in the periodic table and has a symbol of Ar and atomic number of 18. It has an atomic weight of 39.948 and a mass number of 40. Argon has eighteen protons and twenty-two neutrons in its nucleus, and eighteen electrons in three shells.

2020年11月21日 · Atomic mass of Argon is 39.948 u. The atomic mass is the mass of an atom. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element.

Argon makes up 0.94% of the Earth’s atmosphere and is the third most abundant atmospheric gas. Levels have gradually increased since the Earth was formed because radioactive potassium-40 turns into argon as it decays. Argon is obtained commercially by the distillation of liquid air.

Argon is the most abundant gas among the noble elements and is 500 times more abundant than neon. It is present in about 0.00015% (1.288 % by mass) of the Earth’s crust. of liquid air. The argon in earth’s atmosphere is argon-40 and is radiogenic as it is produced during the decay cycle of potassium-40 that is present in the earth’s crust.

Argon is a chemical element with symbol Ar and atomic number 18. Classified as a noble gas, Argon is a gas at room temperature. [Ne]3s 2 3p 6. B. Cordero, V. Gómez, A.E. Platero-Prats, M. Revés, J. Echeverría, E. Cremades, F. Barragán, S. Alvarez, Dalton Trans. 2008, 21, 2832-2838. DOI:10.1039/b801115j PMID:18478144. 1 S 0.

Get the facts about element Argon (Ar) [18] from the periodic table. Find physical data, electron configuration, chemical properties, aggregation states, isotope data (including decay trees) as well as some historic information.

Argon is created when the potassium in the earth's crust decays. It's the most abundant of rare gases. It emits light when electronically excited. About .94% of the earth's atmosphere contains argon. About 1.6% of Mars' atmosphere contains argon.

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 Structure

2021年11月26日 · Atomic mass of Argon is 39.948 u. Note that each element may contain more isotopes. Therefore this resulting atomic mass is calculated from naturally-occurring isotopes and their abundance.