ChToday in Science a Se ngin ats g TodYou will Need: y a1)Pencil, Colored Pencils, Highlighters orMarkers2)Atom Booklet Directions– 1 page 2sides-Picked up Monday3)Test Corrections & Signature – Duetoday
Reminder1)Update Log #32)End of Quarter is Today– if you havemissing assignments you want to turn inthey must be turned in by Today.3)Test #2 Corrections + Parent Signature –Due Today4) Retakes – 9 opportunities- SCHEDULE
Bohr 1922 Denmark - stated that “Planetary” atom model(pg 169) the electrons moved 1.Believed the atom structure was like our around the nucleus in successively large solar system: nucleus in the middle like orbits. He also presented the Bohr the sun and the electrons orbiting like the atomic model which planets. stated that atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states. Schrödinger (Schroedinger ) Wave Mechanic Model1930 Austria - introduced the Shroedinger Equation, a •Planetary model was too specific wave equation that describes the form of the •Rather: electrons vibrate around the probability waves that govern the motion of outside of the nucleus- can only small particles and how these waves are altered predict where they are most like to be by external influences. •QUARKS – protons, neutrons and electrons made up of some of these smaller particles. •http://library.thinkquest.org/05aug/01087/quarks.html
Basic Atomic Structure Today scientists agree on the three basic subatomic particles that make up all atoms.Bohr Model for Lithium(not to scale) Electron = 3(pg 172) P= 3 + N = 3 0Where is most of the mass in the NUCLEUSAtom?Where is most of the volume in the Outside the Nucleus; ElectronAtom? Cloud
All atoms found on the • Neutral – same # of protons(+) andPeriodic Table are # of electrons(-)Isotope • Atoms of the same element with(pg 176) same number of protons and different number of neutrons. nucleus nucleus ProtonHydrogen has 3 naturaloccurring ISOTOPES: Protiu nucleus DeuteriuProtium, Deuterium and m mTritium are Neutro All ROGEN have n l HYD use al Tritium a bec oton. r 1p
Atomic MASS • On the Periodic Table represents a weighted average of the mass of all naturally occurring isotopes of each element. (based on mass and abundance of each isotope). • When atoms gain or lose electronsIONS they become charged. (number of protons (+) and electrons (-) particles are NOT EQUAL)
How do we know if anelement is a metal, 1. Metalloids – are in green boxesnonmetal or metalloid? 2. Nonmetals – are in yellow boxes 3. Metals – are in blue boxesLook on pg. 196-197 Go to the Hyperlink in LearningHow can I find the Bohr Point for this week.Model for my Element? BOHR vs It should read WAVE MODEL and have a picture of a globe next to it.
Homework 1)Atom Booklet– Due Tomorrow 2)Test #2 Corrected & Signed by Parents on the Front – Due TodayHave you noticed HOW the periodictable and the Atomic Structure areRELATED?