chemistry week 4 · 2020. 2. 1. · 4. draw what you think an atom looks like. label your drawing....
TRANSCRIPT
Chemistry Friday, September 15th – Monday, September
18th, 2017
Do-Now Title: “Inquiry Demo” 1. Write down today’s FLT 2. What do you think atoms are? 3. What do you think atoms are made of? 4. Draw what you think an atom looks like. Label
your drawing. 5. What tools do you think you would need in order
to discover or study atoms? 6. Underneath your do-now, write “Demonstration
Notes”
Finished? Take out your planner and table of contents.
Planner: • Finish Atomic Theory WS • 2 more chapters until the unit test J
Table of Contents #1: 16. Inquiry Demo 17. Early Atomic Theory CN A 18. Atomic Theory WS
Demo • Therewillbeasponge,rubbingalcohol,dryice,andasealedglassjar
• Underneathyourdo-now,writeapredic9onaboutwhatyouTHINKwill
happen
Demonstration • Wealreadypredictedwhatwewillsee
Observa1onexpecta1ons:
– Watchwithyoureyes
– Waitun9lthedemonstra9onisfinishedto
writeorsayanything
– Summarizein1-2sentencesORasimple
diagram
Demo • Now,writedownthreeques9onsyouhaveaboutwhatyousaworaboutthe
experimentalvariables.
• Ques9onsshouldbescience-relatedandsomethingyoucannotyetanswer
Demonstration • Partner(s):• Shareeachofyourques9onswitheachother
• Decideasagroupwhichques9onisthe“best”andcouldbeansweredwith
addi9onalevidence,andeveryoneshould
writeitontheirpaper.
• Ifitisyourownques9on,simplyputastar
nexttoit
Explanation • Now,wewillre-watchthevideowiththeexplana9on.
• Remember–thisisapreviewintowhat
wearelearning.Wewillgooverthese
conceptsagain.
• Writedown2-3piecesofevidencethat
couldusetohelpexplaintheexperiment
oryourques9on.
Conclude • Useyourevidencetotrytoansweryourques9on.Youmayneedtomakean
inference.
• Useoneofthefollowingpro-talksentenceframes:
– “Ifwelookatboth….and….Wecansee
that….”
– “Basedontheevidence,suchas…,wecanconcludethat….”
FLT • I will be able to describe early ideas
about the atom by completing Early Atomic Theory Notes A
Standard HS-PS1-8:Developmodelstoillustratethechanges
inthecomposi1onofthenucleusoftheatomand
theenergyreleasedduringtheprocessesoffission,
fusion,andradioac1vedecay
Notes Protocol • Title your notes & add assignment # • Complete Cornell-style • Copy down all bolded ideas • Noise level 0 • Raise hand to question/comment • Be prepared to pair-share-respond
Early Atomic Theory: Part A
Defining the Atom
What is an Atom?
What is an Atom? • Atom=thesmallestpar9cleofanelementthat
retainsitsiden9tyinachemicalreac1on
• Anatomisextremelysmall-whatwouldbe
neededinorderforpeopletodiscoverit?
A history of the atom
• AncientGreece:PhilosopherDemocritusdidnotdiscover
theatom,buthewasoneof
thefirsttosuggesttheir
existence.
A history of the atom • Democritusdescribedatoms
asindivisibleand
indestruc9ble.
• Washecorrect?Couldhe
supporthisideas?
• àTherewasnoevidenceto
supportDemocritus’ideas
(yet)
John Dalton - 1776-1844 • JohnDaltonwasachemistwhostudiedgases,
pressure,andtheexistenceofatoms.
John Dalton - 1776-1844 • JohnDalton=supportedDemocritus’ideawith
scien9ficevidence.
• Cameupwiththeearlyideasforatomictheory...
Dalton’s Atomic Theory 1. All elements are composed of tiny
indivisible particles called atoms
Dalton’s Atomic Theory 2. Atoms of the same element are identical.
The atoms of any one element are different from those of any other element.
Dalton’s Atomic Theory 3. Atoms of different elements can mix or
combine in simple whole-number ratios to form compounds
Dalton’s Atomic Theory 4. Chemical reactions occur when atoms are
separated, joined, or rearranged. Atoms of one element, however, are never changed into atoms of another element as a result of a chemical reaction.
Dalton’s Atomic Theory Note:
Not all of Dalton’s ideas were correct...as we will see when we talk about modern atomic theory :)
How Can We Study Atoms? • Atomscanbeseen
usingextremely
highpowered
microscopes,such
asscanning
tunneling
microscopes.
Sample Questions 1. The ancient Greek philosopher credited with suggesting all matter is made of indivisible atoms is A. Plato B. Aristotle C. Democritus D. Socrates
Sample Questions 1. The ancient Greek philosopher credited with suggesting all matter is made of indivisible atoms is A. Plato B. Aristotle C. Democritus D. Socrates
Sample Questions 2. Dalton’s atomic theory improved earlier atomic
theory by a. teaching that all matter is composed of tiny
particles called atoms b. theorizing that all atoms of the same element are
identical c. using experimental methods to establish scientific
theory d. Not relating atoms to chemical change
Sample Questions 2. Dalton’s atomic theory improved earlier atomic
theory by a. teaching that all matter is composed of tiny
particles called atoms b. theorizing that all atoms of the same element are
identical c. using experimental methods to establish scientific
theory d. Not relating atoms to chemical change
Sample Questions 3. Individual atoms are observable with a. the naked eye b. a magnifying glass c. a light microscope d. a scanning tunneling microscope
Sample Questions 3. Individual atoms are observable with a. the naked eye b. a magnifying glass c. a light microscope d. a scanning tunneling microscope
Pair-Share-Respond 1. Whatisanatom?
2. WhatdidDemocritusbelieve?
3. ListthefourpartsofDalton’satomictheory.
CW • Use your notes and the textbook to
answer the worksheet questions • Attempt every question, even if you’re
not sure – we’ll review the other topics in future notes
• You may work on stamp sheet assignments