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Your Cosmic Connection to the Elements. The Big Idea: Where elements come from and how we read the periodic table. By PresenterMedia.com. http://www.kochanowicz.com/Atoms%20Photos.htm. Atom - smallest particle that an element can be divided & still be the same substance

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your cosmic connection to the elements

Your Cosmic Connectionto the Elements

The Big Idea: Where elements come

from and how we read the periodic

table

By PresenterMedia.com

slide2

http://www.kochanowicz.com/Atoms%20Photos.htm

  • Atom- smallest particle that an element can be divided & still be the same substance
    • Atomos-Greek word meaning “indivisible”

http://education.jlab.org/qa/atom_model.html

the atom s nucleus beyond

http://www.cartage.org.lb/en/kids/science/Chemistry/Atoms/Atomic%20Stucture.htmhttp://www.cartage.org.lb/en/kids/science/Chemistry/Atoms/Atomic%20Stucture.htm

The Atom’s Nucleus & Beyond
  • Protons- (+) charged particles; nucleus
  • Neutrons-neutral; nucleus
    • Quarks-make up P & N
  • e-negatively charged; electron cloud outside of the nucleus

http://www.phys.uu.nl/~thooft/quarks.html

identifying the atom
Identifying the Atom
  • Atomic Number - # of P. In a neutral atom this is also the amount of e-

http://education.jlab.org/glossary/atomicnumber.html

slide5
Mass # - sum of P & N. Round the atomic mass # subtract protons to get the neutrons
  • Atomic mass - average of the masses of the naturally occurring isotopes
  • Atomic mass unit (amu)

SI unit of atomic particles

http://imagine.gsfc.nasa.gov/docs/science/try_l1/cosmic_rays.html

slide6
Isotopes - atoms that have same # of P but different amount of N.
    • Unstable atom - atom whose nucleus can change it composition
    • Radioactive - result of unstable atoms

http://www.bcpl.net/~kdrews/introterms/intro4.html

Free powerpoint template: www.brainybetty.com

big bang theory
Big Bang Theory
  • The current theory behind where all matter started

Note that the only elements that come from the Big Bang are:

Hydrogen

Helium

Lithium (a little bit)

The expansion of the universe began at a finite time in the past, in a state of enormous density, pressure and temperature.

Small Stars- fuse H into He & then fuse

He into C, N, and O. These last 3

Elements make up the air we breathe &

More than 85% of our body weight.

Fusion- process of 2 small atomic nuclei coming

together to make a larger nucleus. The simplest

nuclei to use are deuterium & tritium (isotopes of

hydrogen)

beginning of heavier elements

According to NASA

Beginning of Heavier Elements

Large stars

supernovae

  • Make heavy as well as light elements through process of fusion in their cores.
    • i.e. large stars create Ca in your bones & Fe in your blood, the Si in the soil, & the S that’s in your hair
  • The explosive power of supernovae creates & disperses a wide range of elements.
    • i.e. the chlorophyll in green plants contains Mg from supernovae. The Au used in jewelry & the Ti used in light-weight eyeglass frames.
cosmic rays

http://www.globalwarmingawarenessblog.com/globalwarming-is-due-to-sun-activity-and-not-co2.htmlhttp://www.globalwarmingawarenessblog.com/globalwarming-is-due-to-sun-activity-and-not-co2.html

Cosmic Rays
  • The nuclei of the elements formed in the big bang, stars, & supernovae rain

down on us from space.

  • Lithium used in watch batteries, comes primarily from cosmic rays

http://www2.sjs.org/friedman/PhysAPC/particle.htm