Helium Presentation
Transcript: Formative Assessment Science Ravya 7A Helium (He) Title Image from: Helmenstine, Anne Marie, and Helmenstine. “What Are the Helium Isotopes?” Thoughtco., Dotdash, www.thoughtco.com/isotopes-of-helium-607735. History History - Helium was first found on the sun. - Helium was discovered in the year 1868. - It was first noticed by Pierre-Jules-César Janssen when he conducted a research on total solar eclipse and saw a yellow line on the sun's spectrum. - Then, Sir Norman Lockyer also noticed the yellow line and thought that it could not be assembled by nothing of the elements familiar at the time being. - The unknown element was entitled "Helium" by Sir Norman Lockyer. - They confirmed each other's story. - Helium is named after the Greek god of the sun, Helios. According to (“It's Elemental.” It's Elemental - Isotopes of the Element Barium, education.jlab.org/itselemental/ele002.html.) and (Boissoneault, Lorraine. “How Scientists Discovered Helium, the First Alien Element, 150 Years Ago.” Smithsonian.com, Smithsonian Institution, 17 Aug. 2018, www.smithsonianmag.com/history/how-scientists-discovered-helium-first-alien-element-1868-180970057/.), Pierre-Jules-César Janssen and Sir Norman Lockyer was the first to discover helium. Source Source About 1. Name : Helium 2. Symbol : He 3. Atomic Mass : 4.0026 u 4. Atomic Number : 2 About The picture was taken from: (Aragon, Carlos. “Helium Periodic Table Element Color Icon On White Stock Illustration - Illustration of Graphic, Groups: 87278610.” Dreamstime, Dreamstime, 1 Mar. 2017, www.dreamstime.com/stock-illustration-helium-periodic-table-element-color-icon-white-background-image87278610.) Gas / Non - metal - Party / Scientific balloon. Role in the environment Role - Deep sea diving. - Dating Method / Experiments. Source (Muthiaf, . “Helium in Your Daily Life.” Cutmuthia, 1 Dec. 2013, cutmuthia4.wordpress.com/2013/11/25/helium-in-daily-life/.) listed the roles of Helium for lifestyle uses. This website also confirmed that Helium, Oxygen and Nitrogen was combined to keep divers from high-pressured water under the sea; because (“It's Elemental.” It's Elemental - Isotopes of the Element Barium, education.jlab.org/itselemental/ele002.html.) also confirmed it. (“Water Treatment Solutions.” Lenntech Water Treatment & Purification, www.lenntech.com/periodic/elements/he.htm.) told me about the suffocation that human will suffer if they absorbed helium. Source That's it ! Done