Tianjin Reliance Steel Pipe Industry & Trade Co., Ltd. was officially founded in 2004, and is located in Caigongzhuang Industrial Area in Jinghai County, Tianjin, China. We are a joint-stock enterprise, with 3 branch plants.
Our main products are:
Welded Pipes, Square & Rectangular Hollow Section Tubes
Galvanized Steel Welded Pipe and Pre-galvanized Steel Pipes.
Address:Hi-Tech information square, NanKai district of Tianjin.
Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles – the proton, neutron and electron – come together in trillions of combinations to form … everything. 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. More specifically, we learn about the properties of the nucleus and why they are important to defining what an atom actually is.
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Table of Contents
Einstein & Atoms 02:05
Composition of Atoms 03:18
Atomic Number 04:20
Relative Atomic Mass 07:26
Mass Number 07:44
Watch the SciShow episodes on the Strong Nuclear Force here: http://www.youtube.com/watch?v=Yv3EMq2Dgq8
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