ALEX Resources

   View Standards     Standard(s): [SC2015] CHEM (9-12) 2 :

2 ) Develop and use models of atomic nuclei to explain why the abundance-weighted average of isotopes of an element yields the published atomic mass.

In this episode, Hank talks about transmutation among elements, isotopes, calculating half-life, radioactive decay, and spontaneous fission.

   View Standards     Standard(s): [SC2015] CHEM (9-12) 2 :

2 ) Develop and use models of atomic nuclei to explain why the abundance-weighted average of isotopes of an element yields the published atomic mass.

Continuing our look at nuclear chemistry, Hank takes this episode to talk about fusion and fission. What they mean, how they work, their positives, negatives, and dangers. He also discusses e=mc2, mass defect, and applications of fission and fusion in the real world.

   View Standards     Standard(s): [SC2015] CHEM (9-12) 2 :

2 ) Develop and use models of atomic nuclei to explain why the abundance-weighted average of isotopes of an element yields the published atomic mass.

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.