Textbook Notes (368,098)
United States (205,941)
Chemistry (43)
CHE 101 (11)
Kim Keil (2)
Chapter 2

CHE101 Chapter 2 Lecture Notes

4 Pages
79 Views
Unlock Document

Department
Chemistry
Course
CHE 101
Professor
Kim Keil
Semester
Fall

Description
Chapter2AtomsMoleculesandIonsAtomicTheoryofMatterThetheorythatatomsarethefundamentalbuildingblocksofmatterreemergedinthethearly19centurychampionedbyJohnDaltonHowmanyatomsyoustartoutwithinyourreactionishowmanyyouwillendupwithinyourproductDaltonsPostulatesAllatomsofagivenatomareidenticalinmassandotherpropertiesbuttheatomsofoneelementaredifferentfromtheatomsofotherelementsAtomsofanelementarenotchangedintoatomsofadifferentelementbychemicalreactionsatomsareneithercreatednordestroyedinchemicalreactionsAtomsofmorethanoneelementcombinetoformcompoundsagivencompoundalwayshasthesamerelativenumberandkindofatomsLawoftheConservationofMassThetotalmassofsubstancespresentattheendofachemicalprocessisthesameasthemassofsubstancespresentbeforetheprocesstookplaceLawofMultipleProportionsIftwoelementsAandBformmorethanonecompoundthemassesofBthatcombinewithagivenmassofAareintheratioofsmallwholenumbersSubatomicParticlesProtons1andelectrons1haveachargeneutronsareneutralAtomicmassoAmassscaleontheatomiclevelisusedwhereanatomicmassunitamuisthebaseunit24o1amu166054x10gAtomicnumberthenumberofprotonssubscriptMassnumberthetotalnumberofprotonsandneutronssuperscriptIsotopesoAtomsofthesameelementwithdifferentmassesoDifferentnumbersofneutronsbutthesamenumberofprotonsoAllatomsofaspecificelementarentidenticalThenumberofneutronscanchangeinaneutralatomoIsotopeshavedifferentmassesandabundancesinnature
More Less

Related notes for CHE 101

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit