The partial pressure of neon = 0.789 × 25 bar = 19.7 bar. In addition, 17 radioactive isotopes have been discovered ranging from 15 Ne to 34 Ne, all short-lived. Enter a chemical formula: Browse the list of common chemical compounds. In this manner, what is the mass of 6.02 x10 23 atoms of aluminum? Solution: Avogadro number: The given problem will solve by using Avogadro number. Relevance. Neon-20Ne, 70 atom % More... Molecular Weight: 19.99244 g/mol. Favorite Answer. The number 6.022 × 10²³ is called Avogadro number. E) It has 8 electrons in its outer electron shell, it is inert, and it has an atomic mass of 10 daltons. Steve O. Lv 7. Mass Percent: Neon: Ne: 20.1797: 1: 100.000% ›› Calculate the molecular weight of a chemical compound. 2 Answers. 4 years ago. The element neon consists of 3 isotopes with masses 19.92, 20.99, and 21.99 amu. It wants the answer in mg? Please visit the Neon element page for information specific to the chemical element of the periodic table. are occupied in 1 mole of a substance. Get an answer for 'Calculate the average atomic mass of neon from the following data. Neon is used in vacuum tubes, lightning arresters, high voltage indicators, water meter tubes, television tubes and helium-neon lasers. 0 0. Isotopes With A Known Natural Abundance. Click hereto get an answer to your question ️ An atom of neon has a mass of 3.35 × 10^-23 g . The mass number of an element will depend on which isotope of that element is being considered. They are equal to 11 and 23, respectively. Potassium is a chemical element with atomic number 19 which means there are 19 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. Another $$0.3\%$$ of the atoms are $$\ce{Ne}$$-21, which is an isotope of neon with 11 neutrons and a mass of $$20.99 \: \text{amu}$$. The sample passes through the electron beam which ionises the atoms of each isotope: 20 Ne → 20 Ne + + e- (or 20 Ne + e-→ 20 Ne + + 2e-) 21 Ne → 21 Ne + + e- (or 21 Ne + e-→ 21 Ne + + 2e-) 22 Ne → 22 Ne + + e- (or 22 Ne + e-→ 22 Ne + + 2e-). In the above, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. The atomic number of a sodium atom is 11 and its mass number is 23. Relevance. 0 0. Calculate numbers of protons, neutrons, and electrons by using mathematical expressions (1-3): p = 11. n = 23 - 11 = 12. e = 11 - 0 = 11 4. The most abundant isotope of neon is 20, because the atomic weight is close to 20. Atomic Number: 10; Atomic Weight: 20.1797; Classification: Noble gas; Phase at Room Temperature: Gas; Density: 0.9002 g/L @ 0°C ; Melting Point:-248.59°C, -415.46°F; Boiling Point:-246.08°C, -410.94°F; Discovered by: Sir William Ramsay and M. W. Travers in 1898; Neon is the second noble gas located in column 18 of the period table. The total number of moles of neon and dioxygen = 2.21 + 8.29 = 10.49 The mole fraction of neon = 10.49 8.29 = 0.789 Total pressure in the cylinder is 25 bar. 4 Answers. The mass number of an atom is the total number of protons and neutrons found in its nucleus. The mass of Neon sample, {eq}m=30.0\;\rm g {/eq} The atomic mass of {eq}\rm Ne {/eq} is {eq}M=20\;\rm u {/eq}. It could also be Ne-21 so it could actually be 21, but never ever should a mass number of an isotope be a decimal. A) It has 8 electrons in its outer electron shell. D) It has 8 electrons in its outer electron shell and it is inert. Name: Neon Symbol: Ne Atomic Number: 10 Atomic Mass: 20.1797 amu Melting Point:-248.6 °C (24.549994 K, -415.48 °F) Boiling Point:-246.1 °C (27.049994 K, -410.98 °F) Number of Protons/Electrons: 10 Number of Neutrons: 10 Classification: Noble Gas Crystal Structure: Cubic Density @ 293 K: 0.901 g/cm 3 Color: colorless Atomic Structure 7 years ago. Neon (10 Ne) possesses three stable isotopes, 20 Ne, 21 Ne, and 22 Ne. Isotopes of the Element Neon [Click for Main Data] Neon | Previous | Main Data | Next | Most of the isotope data on this site has been obtained from the National Nuclear Data Center. It is also used as cryogenic refrigerant. 20.0 mg Xe @ (20.18 mg / mmol Ne) / (131.29 mg / mmol Xe) = 3.074 mg of Ne. Answer: The mass of neon for the given number of atoms will be 9.8 g. number of atoms. Your question is posted in the wrong category. Has three stable isotopes, and 21.99 amu on molar mass and molecular weight: 19.99244 g/mol a second,! 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