So, Argon-40 would seem to be: 18 electrons which requires 18 protons and 22 neutrons. : Protons, Electrons, and Neutrons, continued 17. Part I: Protons, Electrons and Neutrons, continued Part ! Neutron is 1.0086652 atomic mass units. On the periodic table, argon's atomic number is 18. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Oh. The center of the atom is called the nucleus. Finding the number of protons, neutrons and electrons of elements. (1) protons and electrons (2) protons and neutrons (3) protons and neutrons (4) positrons and electrons : 3 : 3 : 3. a brief scan of Wikipedia reveals that argon has numerous isotopes, of which the most abundant by far is Argon 40; that is 18 protons and 22 neutrons. Because Mass number-Atomic number=No of neutrons Mass number of Argon=40 No of Neutrons=40-18=22 A neutral atom of argon also has 22 Neutrons. Good Luck. is also 18. Number of Protons: 26: Number of Neutrons: 30: Number of Electrons: 26: Melting Point: 1535.0° C: Boiling Point: 2750.0° C: Density: 7.86 grams per cubic centimeter: Normal Phase: Solid: Family: Transition Metal: Period: 4: Cost: Unknown . I think I got it correct. -Argon Ar -Sulfur S - ... How many protons, electrons, and neutrons are in an atom? 1. Which particles are found in the nucleus of an argon atom? The three main subatomic particles that form an atom are protons, neutrons, and electrons. Protons and neutrons make up the nucleus of an atom. First, let's learn a bit about protons and neutrons, and then we will talk about electrons a little later. Atomic Mass ='ÿrounded) Number of neutrons = I ÿ' Number of Energy Levels =ÿ 18. This tells you that it has 18 protons. There are 22 neutrons in one atom of argon. And the element with atomic no. The chemical symbol for Argon is Ar . In this case the number of protons is 18,So,the atomic no. Mostly Argon-40. (18+22=40). Neutral Atom of Chlorine Atomic Number= 1""7 Number of protons = I1 Number of electrons = I'1 Is the last energy level full? This question was the best answered on the paper and generally well answered question. Proton is, I think, 1.0078252 amu. 19 protons and 18 electrons; b. Examiners report. Learn with flashcards, games, and more — for free. The mass of an electron is (1) equal to the mass of a proton (2) equal to the mass of a neutron (3) greater than the mass of a proton (4) less than the mass of a neutron The mass of Argon is 39.944 which is that mixture of isotopes. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. 18 is Argon with symbol Ar Now we need to find the mass number of Argon . It is mostly Argon-40; small amts. 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