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Chapter 4.3 Metals

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David Thaggard

on 13 October 2012

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Transcript of Chapter 4.3 Metals

Scientists use specific properties to classify Metals Physical Properties of Metals include
Malleability--how easily a metal can be shaped
Ductility--drawing or forming a metal into a wire
Conductivity--how easily a metal transfers heat and/or electricity
Chemical Properties of Metals include
Reactivity--or how easily (and quickly) a metal goes through a chemical change when it comes in contact with another substance;
Corrosion--a specific type of reaction that destroys a metal. Metals become less reactive As you move from Left to Right on the Periodic Table, Metals become less reactive. Heavy Metals and Particle Accelerators No, not that kind of heavy metal. Don't even bother making the joke. Seriously.

Elements that have more mass (or "heavier") than No. 92 on the Periodic Table--Uranium-184--don't exist on Earth naturally. That is, the conditions that create them (stars blowing up) don't exist here on Earth, so scientists have to rely on Particle Accelerators to combine atoms to create them. So, when it comes to the Periodic Table, most elements appear as Metals. There are three different things you need to know about Metals and the Periodic Table:
1. There are a handful of properties that scientists use to classify all those elements as metals;
2. As you move from Left to Right, Metals get less reactive--that is, they don't blow up or go through chemical changes as easily (or at all);
3. Elements that are heavier (more massive) than Uranium-184 (that's number 92 on the Periodic Table) don't exist in nature on Earth--they are created in Particle Accelerators. Chapter 4.3 Metals
Grade 8 Physical Science
Thaggard 'Course, the good news is that Metals on the left side are very reactive--and I think we all know what that means :) Reactive! Not Reactive! Particle Accelerators use magnets and electricity to accelerate atomic particles to ridiculous speeds--some approach .999 times the speed of light (that's 186,000 mi/s or nearly 700,000,000 mi/h). Then, they smash those particles against other particles to fuse them together and make the heavy elements.
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