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Alchemy: Lessons 11-16
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- 1When are we exposed to radiation?- there is a small amount of radiation found in water (from minerals)
- when you fly in an airplane, you are closer to the sun and receive more radiation
- medical devices
- you cannot tell when you're being radiated - 2Atom-came from the Latin word meaning indivisible
-the smallest particle of matter that will retain key characteristics that behave like an element - 3ModelA representation that we make simpler for learning or communication purposes
- 4Plum Pudding Modelthe atom could be divided into positive and negative parts --> fluid + electrons
- 5Nuclear Modelnot fluid --> divided into the nucleus and the outer parts
- 6Solar System modelcan be divided into a nucleus and electrons
- 7Proton Modelthe nucleus contains protons
- 8Electron Cloud Modelan electron cloud surrounds the nucleus
- 9Nucleus-most dense part of the atom
-located in the center
-composed of protons and neutrons - 10Proton-the number of protons = the atomic number
-defining feature of an atom - 11Electron-smallest subatomic particle
- 12Neutral Charge-when there is the same amount of protons and neutrons
- 13Neutron-the amount can change without affecting the element
-neutrally charged particle in the nucleus of the atom - 14Isotopevariation in the nucleus of atoms of the same element, that results in the change of mass; found by adding or subtracting neutrons
- 15Hyphen Notationfull element name - mass #
- 16Symbol NotationMass #
Element Symbol
Atomic # - 17Average Atomic Masscompare the mass # with the average atomic mass
- 18Radioactiveunstable atoms will emit small particles from the nucleus spontaneously (without putting in work) until it is stable
- 19Stablea stable atom will not change the formation of its nucleus
- 20Radioactive Trends1. all elements great than 83 are radioactive (being radioactive depends on the ratio of neutrons to protons)
2. large elements are stable at 2:1
3. small elements are stable at 1:1
*all elements greater than uranium are synthetic* - 21Nuclear Reactionthe change in the nucleus of the atom
*will be a change in the neutrons, not protons because that would be a change in the element
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- Fichas sobre Alchemy: Lessons 11-16 , creado por piperdlewis el 28/09/2015.
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