Helium by Brooke Milam https://padlet.com/brookemilam/8kjnpabbo2ai49dp en-us 2020-10-05 18:37:07 UTC 2020-10-06 20:42:41 UTC hello@padlet.com Periodic Table Information brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/804368911 Atomic # - 2
Symbol - He
Atomic Mass - 4.0026
Valence Electrons - 2]]> 2020-10-05 18:40:01 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/804368911 Where it is on the Periodic Table and why? brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/804383629 Helium is located in column 18, row number 1 of the periodic table. It is in column 18 because it is a noble gas, and row #1 because it has 1 electron shell.]]> 2020-10-05 18:43:56 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/804383629 Elements that are similar brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/804403432 All of the noble gasses are similar to helium, they all have filled valence shells which makes them all non-reactive.]]> 2020-10-05 18:49:27 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/804403432 Who discovered it? How? brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/804421226 Helium was discovered by Pierre J. C. Janssen on a trip to India in 1868. He observed a sunset where he noticed a bright yellow line, he assumed it was sodium, but later an English astronomer named Norman Lockyer discvoered the same yellow line and determined it an unknown element in the sun. Along with the help of English chemist Edward Frankland, they named this new element helios, after the greek word for sun.]]> 2020-10-05 18:54:29 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/804421226 Is it found in nature and if so, where? brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/806596574 Helium is not found so much on earth as it is in space, but there are some places that still have radioactive decay that contain helium. ]]> 2020-10-06 13:28:18 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/806596574 Physical and Chemical Properties of Helium brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807793945 -Light
-Odorless
-Colorless
-Melting Point = 0.95 K (or -272.2 C)
-Boiling Point = 4.22 K (or -268.928 C)]]> 2020-10-06 17:50:55 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807793945 Uses for Helium brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807802529 -Medicine
-Scientific research
-Arc welding
-Refrigeration
-Gas for aircrafts
-Coolant for nuclear reactor
-Cryogenic research
-Detecting gas leaks

]]> 2020-10-06 17:52:46 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807802529 What Does/Can Helium Form brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807840516 When put under pressure with sodium, helium can form a crystalline compound. Under pressure in ice, helium can form Clathrates and other small molecules such as nitrogen.]]> 2020-10-06 18:01:15 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807840516 Interesting Facts brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807854856 - Second most common element in the universe.
- Helium is so light that earths gravity can't hold onto it. When helium atoms are released into the air,  they continue to rise until they go into space.
- Helium was discovered on the sun before it was discovered on Earth.]]> 2020-10-06 18:04:19 UTC https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807854856 Sources brookemilam https://padlet.com/brookemilam/8kjnpabbo2ai49dp/wish/807922501 “Helium - Element Information, Properties and Uses: Periodic Table.” Helium - Element Information, Properties and Uses | Periodic Table, www.rsc.org/periodic-table/element/2/helium. 


says, LILLlAN, and SuperAngel says. “LILLlAN.” Chemicool, www.chemicool.com/elements/helium-facts.html. 


“What Are Two Elements That Would Have Properties Similar to Xenon?: Socratic.” Socratic.org, 19 June 2018, socratic.org/questions/what-are-two-elements-that-would-have-properties-similar-to-xenon. 


Williams, Matt. “Who Discovered Helium?” Universe Today, 19 Mar. 2016, www.universetoday.com/53563/who-discovered-helium/. 


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