On the periodic table, argon's atomic number is 18. in what field does argon belong? :) … It is a nonmetal and a gas at room temperature. Q. How many protons, neutrons and electrons does Argon have? Potassium (K) Calcium (Ca) Nitrogen (N) Neon (Ne) Tags: Question 25 . Argon has 22 neutrons in its nucleus, and the atomic weight of argon is 39.948 atomic mass units. How many neutrons and electrons does argon have? Your welcome! 1 1. How many protons neutrons and electrons does argon have? the mass is made up of both protons and neutrons... therefore 40 - 18 = # neutrons. This means that some Argon atoms have 18 neutrons, some 20 neutrons and some 22 neutrons the isotope with 22 neutrons is the most common and forms 99.6% of all Argon. Argon (Ar) atom Bohr model video using the Periodic Table to determine the number of Protons, neutrons, the Atomic Mass, Atomic Number, number . If an element has 83 protons, what is its atomic number and which element is it? anon252703 22 hours ago . N = 22. there are 22 neutrons. What common compounds does Argon form? 18 protons, 18 electrons, 40-18=22 neutrons. 22. The number of protons is what defines the element. answer choices . 4. The protons and electrons cancel each other out because protons produce a positive charge, electrons a negative charge, and they have the same amount. How many electrons does it have? Argon has an atomic number of 18 and and Atomic mass of 40. An atom of argon has 18 protons and 22 neutrons. (Isotopes of an element have varying numbers of neutrons in the nucleus.) Tags: Question 24 . SURVEY . There are 22 neutrons in one atom of argon. 900 seconds . It is a noble gas and belongs to period 3 and group 18 of the periodic table. (Use your periodic table.) Therefore, argon has no electric charge (as with other elements). - 3377908 Answer (1 of 4): 18 protons, 18 electrons, and 22 protons. anon110827 September 13, 2010 18. answer choices . anon138682 January 2, 2011 . 18 + N = 40. 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 5 years ago. anon112516 September 20, 2010 . Please answer me asap! Argon was discovered by Sir William Ramsay in 1894. Anonymous. argon has a molar mass of 40 and 18 prontons. In order to write the Argon electron configuration we first need to know the number of electrons for the Ar atom (there are 18 electrons). argon has 22 neutrons 40. Because its outer electron shell is full, it is chemically unreactive. Atomic number is the number of protons. 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