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Describe the composition of a neutral atom of this isotope for protons, neutrons, and electrons. The number of electrons that orbit an atom determine its chemical properties. The artificial element decays by ejecting alpha particles.Americium has an atomic number of 95 (the number of protons in the nucleus of the americium atom). A sliver of americium foil sitting between a positively and negatively charged plate inside the detector, shoots out a constant stream of radioactive alpha particles. The americium was produced by bombarding plutonium with neutrons in a nuclear reactor. the Americium is radiate element in the Actinium series 5f in the periodic table its atomic number is 95 so. Number of neutrons: atomic mass of an isotope - number of protons Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. Americium’s radioactivity drives the smoke detecting mechanism in household smoke detectors. The number of protons is unique for each chemical element. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Like all artificial elements, it has no known stable isotopes.The first isotope to be synthesized was 241 Am in 1944. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Radioactive americium-241 is used in household smoke detectors and in bone mineral analysis. Adding protons to the amount of neutrons. Origin of Name: From smarskite, a mineral: Date and Place of Discovery: In 1879 in Paris, France: Discovered by: Paul Emile Lecoq de Boisbaudran: Common Compounds: Samarium chloride (SmCl 3); Samarium iodide (SmI 2); Interesting facts The americium isotope 241 Am is used in smoke detectors. The chemical symbol for Americium is Am . The number of neutrons can vary by isotope, with three notably synthesized: Am-241 (146 neutrons) Am-242 (147 neutrons) Am-243 (148 neutrons). The chemical symbol for Americium is Am . Americium has 95 protons and electrons. Mass number is represented as the. P -95 N- E-95. Even though protons and neutrons are about 2,000 times heavier than electrons, they are tiny. How many protons, neutrons, and electrons are there in this neutral atom of Am 240? Americium (95 Am) is an artificial element, and thus a standard atomic weight cannot be given. Americium is a synthetic radioactive chemical element with the symbol Am and atomic number 95. Larger number (with decimals) on the elements tile. This produced isotope americium-241, which has a half-life of this is 432 years. Give the number of electrons, protons, and neutrons in an atom of americium-241. Americium has 95 protons and electrons. These particles are bunches containing two neutrons and two protons. 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