Agenda Review Elements Review Atomic Theory Song Atomic pictures Notes.

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Presentation transcript:

Agenda Review Elements Review Atomic Theory Song Atomic pictures Notes

Ag silver

Ni nickel

Cr chromium

Cd cadmium

Ti titanium

Cu copper

Sc scandium

Fe iron

Au gold

V vanadium

Mn mangenese

Hg mercury

Co cobalt

Zn zinc

First to propose idea of atom Democritus

Wrote out the first four point atomic theory Dalton

Found the e - Thomson

Experimented with cathode ray tubes Thomson and Goldstein

Thomson’s plum pudding

Found the electrical charge of the e - Millikan

Did the oil drop experiment Millikan

Did the gold foil experiment Rutherford

Found the proton Goldstein

Found the nucleus Rutherford

Found the neutron Chadwick

Atomic Theory Polka Dalton, Thomson, Rutherford and Bohr. Schrödinger and Heisenberg, and many, many more. Used their brains to venture in the realm of inner space and found the world of the atom was a weird and wondrous place.

Dalton did experiments and said, “I think it’s clear, atoms are tiny indestructible spheres.”

Thomson worked with cathode rays and said, “I disagree. A plum-pudding model makes much more sense to me.” A new chapter in atomic theory started to unfold.

When Rutherford played around with atoms made of gold. When a few of his alpha particles came bounding back, he hypothesized a nucleus had knocked them off the track.

Dalton, Thomson, Rutherford and Bohr. Schrödinger and Heisenberg, and many, many more. Used their brains to venture in the realm of inner space and found the world of the atom was a weird and wondrous place.

Bohr saw spectral lines for hydrogen and said, “It seems to me.. Electrons move in orbits with specific energies.”

Heisenberg said, “Forget it, there’s no way to know the orbit or a path, where the electron’s gonna go.”

Schrödinger used lots and lots of fancy mathematics, and made a model of the atom based on quantum mechanics. It has orbitals and those are based on probability. The atom is a fuzzy blob of pure uncertainty.

Dalton, Thomson, Rutherford and Bohr. Schrödinger and Heisenberg, and many, many more. Used their brains to venture in the realm of inner space and found the world of the atom was a weird and wondrous place.

Pictures Cut out and tape or glue these pictures in to the appropriate sections of your notes

What do you know about atom?

How Atoms Differ Date:

Subatomic Particles  PROTONS  p +  In the nucleus  +1 charge  1 amu  ELECTRON  e -  In electron cloud  -1 charge  1 / 1840 amu  NEUTRON  n o  In the nucleus  No charge  1 amu

Atomic number  Used to arrange elements in PT by Mosley  # of PROTONS  # of ELECTRONS IF an ATOM

Isotopes  Atoms of the same element that differ in the # of neutrons

Atomic Mass  The weighted average of all isotopes.  Always a decimal (unless a man-made element)

Mass number  Mass of an isotope  Always a whole number – not on PT  # of PROTONS + NEUTRONS

Nuclide  Tells atomic # and mass # of an atom Na  Sodium-23 has ____ protons, ___ electrons and ____ neutrons

Practice

32 16 S

28 14 Si

14 6 C