Subatomic Particles Agenda   Review   GAME   Song   Notes   Guided practice   Homework

Around the World Game Element Review

strontium Sr

manganese Mn

Ba barium

boron B

Ca calcium

Zn zinc

Al aluminum

silicon Si

iron Fe

C carbon

gallium Ga

cobalt Co

magnesium Mg

Be beryllium

Ti titanium

Ge germanium

potassium K

nickel Ni

P phosphorus

nitrogen N

Cu copper

H hydrogen

lithium Li

Na sodium

chromium Cr

V vanadium

tin Sn

scandium Sc

Pb lead

arsenic As

O oxygen

sulfur S

Se selenium

fluorine F

Cl chlorine

bromine Br

I iodine

helium He

Ne neon

argon Ar

Kr krypton

xenon Xe

Rn radon

Song Time

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.

What do you know about the atom? White boards

Subatomic Particles Date:

 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 11p + 11n o 11p + 12n o

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 11 12

Practice

32 16 S 16 protons 16 neutrons 16 electrons

28 14 Si 14 protons 14 neutrons 14 electrons

14 6 C 6 protons 8 neutrons 6 electrons

Ions  Atoms with a charge

CATIONS  Cations are pawsitive and are written with a plus charge on the upper right.  LOST an e-, have more protons; therefore positive.  Charge indicates the number of electrons lost.  Hint: cation has a t which looks like +

Lost an e - and a shell 11p + 11n o 11p + 11n o

ANIONS  Anions are negative and written with a negative charge on the upper right.  GAINED an e-, have more electrons; therefore negative.  Charge indicates number of electrons gained.

Has an additional electron! 9p + 10n o 9p + 10n o

36 17 Cl -  _____ protons _____ neutrons _____ electrons

Practice

16 8 O -2 8 protons 8 neutrons 10 electrons

Ag + 47 protons 61 neutrons 46 electrons

80 35 Br - 35 protons 45 neutrons 36 electrons

Pb protons 125 neutrons 78 electrons

Homework   Element Quiz tomorrow!   Last one!   Be prepared for lab tomorrow!   Want to try to complete tomorrow   Complete subatomic chart