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Oxygen
Oxygen is the gas that we breath in. It makes up almost 20% of Earth's atmosphere. John Pitilessly discovered it when he was studying photosynthesis. Oxygen is highly reactive and is a nonmetal and is number 8 on the periodic table. -
Atomic Theory
Created by Dalton, states that all matter is made up of atoms, which invisible and indestructible. All atoms of the same element have the same properties and size/ mass. -
Synthesis of Urea
Discovered by Fredrich Wohler in an attempt to synthesizes ammonium cyanate. Starting point of modern organic chemistry -
Chemical Stuctures
Lewis was developing a theory of covalent bonds, which is the heart of chemistry. Suggested that chemical bonding happened through electrons. -
Atoms have Signature Light
Robert Bunsen discovered that each element has a specific signature light, which is how we can tell of the chemical composition of a distant star or planet. -
Period: to
Plastics
John Hien founded a use for the long and bendable molecule of cellulose, which then later was made completely synthetically, giving us the first true plastics -
Periodic Table of Elements
The periodic table of elements was created by famed chemist Dmitri Mendeleev. It's a table of all elements that are arranged based in their properties.It shows everything from electron configuration to the amount of valence electrons and the element's reactive properties. -
Period: to
Radioactivity
We discovered radioactive elements, which are some of the most commonly used elements today. -
The Electron
The negatively charged part of an atom that rotates around the nucleus. It is was causes atoms to bond with other atoms to from molecules. Shows why the element has a certain property. -
Fullerenes
It costs more than gold, and it is the strongest substance in the known universe. its made up of highly stable carbon molecules that form nano tubes, smaller than DNA. Discovered by Robert Cuero and Harold Crudo.