I know, you aren't shocked, you aren't awed, you might not even be paying attention any more, but when atomic theory was first proposed, it sounded pretty crazy. So today, let's start out with maybe the biggest idea of all time, and move on from there, stuff is made from atoms. I love chemistry, and I hope I can give you a glimpse into why. Chemistry has it all, mad scientists, world changing revelations, the practical, the impractical, medicine, bombs, food, beauty, destruction, life and death, answers to questions you never knew you had. But calling chemistry a bridge is like calling Eurasia an island. Now chemistry is a peculiar science, sometimes talked about as a bridge between the ultra abstract world of particle physics and the more visible sciences like biology. Chemistry is the science of how three tiny particles, the proton, the neutron and the electron came together in trillions of combinations to form, get this, everything. Chemistry holds the secrets to how life first formed, how cancers are cured, how iPhones have bigger hard drives than 5 year old laptops and how life on this planet might just be able to continue thriving, even ours, if we play our cards right. This is just my opinion here, but I think that understanding the world leads to greater ability to enjoy the world and there's nothing that helps you understand the world better than chemistry. And if you give it a chance it will not only blow your mind but also give you a deeper understanding of your world. If you give me five minutes to try to convince you that chemistry is not torture, but instead the amazing and beautiful science of stuff. Want to find Crash Course elsewhere on the internet?Įxpand all | Collapse all Hello, I'm Hank Green and I want to teach you chemistry. Watch the SciShow episodes on the Strong Nuclear Force here:Ĭrash Course is on Patreon! You can support us directly by signing up at we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! This video is available in Spanish on our Crash Course en Español channel! Watch it here: More specifically, we learn about the properties of the nucleus and why they are important to defining what an atom actually is. In this inaugural episode of Crash Course Chemistry, we start out with one of the biggest ideas in chemistry ever - stuff is made from atoms. Chemistry can tell us how three tiny particles - the proton, neutron, and electron - come together in trillions of combinations to form. Join Seneca to get 250+ free exam board specfic A Level, GCSE, KS3 & KS2 online courses.Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Want to learn more about Atom Size & Number? This information can be found for each element in the periodic table. The atomic number of an atom is the number of protons in the atom. The mass number of an atom (also called relative mass) is the total number of protons and neutrons in a nucleus. Relative mass of electrons = 0.0005 (this gets rounded to zero).Ītoms: Relative mass = number of protons + number of neutrons. **Mass: **Sub-atomic particles: Relative mass of protons and neutrons = 1. If an atom was the size of Wembley Stadium, then the nucleus would be the size of a garden pea. The nucleus of an atom is 10,000 times smaller than the atom. About 5 million hydrogen atoms could fit into a pin head. **Size: **Atoms have an average radius of about 0.1 nm. They are made up of sub-atomic particles (protons, neutrons, and electrons), which are even smaller and lighter than an atom.
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