chapter 2 : chemistry
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DESCRIPTIONChapter 2 : Chemistry. Biology. Intro. Democritus believed “that all things were made up of the same “pure essential substances” Greek word “atomos” means to cut. EVERYTHING is made of atoms. Cells, paper, rocks, squirrel, cheese, hair, chair …. - PowerPoint PPT Presentation
Chapter 2 : ChemistryBiology
IntroDemocritus believed that all things were made up of the same pure essential substancesGreek word atomos means to cut
EVERYTHING is made of atomsCells, paper, rocks, squirrel, cheese, hair, chair .How many kinds of atoms? Well there is a limited amount we organize them on the Periodic Table There are 92 that occur naturally and 117 as of 10/2006
Periodic TableWhat page in your book ?
Back to atomsHow small are they?How can we see them?What are they made of -100 million side by side would only be 1cm-Scanning tunneling microscopy- Protons neutrons electrons
Atoms Resemble a solar system. Some people sayNucleus- center Electron Cloud- space outside
Inside: Protons, and NeutronsOutside: Electrons constantly moving in orbits
Sizes: P are much bigger than EWhere is most of the mass? Inside/outside?
3 particles review
Charges++, _________ -- _________ +- _______MagnetsOpposites Attract David Blaine and levitationhttp://www.metacafe.com/watch/1340/david_blaine_levitate/
Other famous peopleRussell Simmons: VegasJoey Fatone : N Sync- NYCTrevor: Blink 182- VegasBilly Dee Williams: HobokenSean Puffy Combs- NYCTony Soprano - Belleville filming Sopranos - Nutley Queen MargaritaRicki Lake NYCGerard Way- My chemical romance
Atom/element/compoundAtom: Element: only 1 kind of atom pureCompound: red is O, and H is orange
Made up of more than 1 kind of atom in definite proportions
Gold: Au Pt: ?
Is your jewelry pure gold?
Why are platinum rings better than gold?No. Its an alloy Gold by itself is actually too soft to wear as jewelry..Which of these has the most amount of gold 10k, 14k, 24k ?When you scratch gold, its so soft, you are actually leaving it behind. Platinum is a harder metal and more rare, no scratches.
Why are certain things of the periodic table so valuable?Elements: cant make it . (maybe a well trained scientist)Found in nature- low supplyFYI.Black gold- oil- low supply (not an element)Weather Channel- the elements
According to the Empedocles, a Greek philosopher, scientist and healer who lived in Sicily in the fifth century B.C., all matter is comprised of four "roots" or elements of earth, air, fire and water.He associated these elements with four Greek gods and goddesses - air with Zeus, earth with Hera, fire with Hades, and water with Nestis (believed to be Persephone):