Welcome to my new hyper fixation. Elements of the Periodic Table. Use arrows or space. Hydrogen (I lost all quality in this image :,) I also made this maybe a week or so earlier than the helium so, the helium is way better.) Symbol: H Atomic number: 1 Hydrogen was "discovered" by Henry Cavendish in 1766. Which he called "inflammable air." I say "discovered" because others found it before him but didn't follow through with their discoveries so Cavendish gets the credit. In the early 1500's the alchemist Paracelsus observed how bubbles formed when iron fillings were put into sulfuric acid were flammable. Later in 1671, Robert Boyle made that same observation. Although, they didn't follow through with their discovery of hydrogen. So, as stated before Cavendish gets the credit. The way Cavendish is similar to Paracelsus in the way that they discovered Hydrogen. They both observed bubbles caused by hydrogen. Cavendish collected these bubbles and proved how they were different from other gases; this led to figuring out how water is not an element. Fun fact: Hydrogen is the most abundant and simple element in the universe. 73% of the mass of the visible universe is Hydrogen. It can have only one proton and one electron, which makes it the only stable element that can exist without neutrons. Helium Symbol: He Atomic Number: 2 (I have to severely simplify this because it's very confusing and I don't fully understand myself.) The first observation of Helium was made on August 18th, 1868, by French astronomer Jules Janssen. He was observing a solar eclipse through a prism when he noticed a bright yellow line coming from the chromosphere of the sun. (The outside layer of the sun or the red rim around the moon during a solar eclipse.) He thought it was sodium because it seemed closer to a line that sodium would cause. On October 20th of that same year, an English astronomer Norman Lockyer observed the same line. He concluded that it must have been caused by an unknown element in the sun. Lockyer and Edward Frankland, an English chemist, named the element helios, which is the Greek word for the sun. Fun fact: Helium is so light it can escape the Earth's gravity. It is the second most abundant element. It takes up 25% of the mass of the visible universe and with Hydrogen taking up 73%, all other elements are in the 2%. I will be doing more of these until I get bored or do all of them. I'll probably be doing all of them.
Credit to @ProfGhostington for helping me pose the helium cat And credit to the websites I used! phys.(delete)org rsc.(delete)org
