# VanWyhe SIPC02 AverageAtomicMass.docx - Course: Unit:...

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Prior Knowledge Question(Do this BEFORE using the Gizmo.)QuestionAnswerPointsPossiblePointsEarned1.In the image below, the cans of souphave different masses. Without doingthe math, estimate the average massof a can of soup.I’d estimate the mass to be abouttwo or three hundred grams.12.Now calculate the average mass byadding up the masses of all the cansand dividing by the total number ofcans.What is the average mass of a can ofsoup?The average mass of a can of soupis 200g.13.How close was your prediction?My prediction was almost perfect.Gizmo Warm-upJust like cans of soup, atoms of the same element often havedifferent masses. These different varieties are calledisotopes. IntheAverage Atomic MassGizmo, you will learn how to find theaverage mass of an element using an instrument called amassspectrometer.To begin, check thatCarbonis selected and theIsotope mixCustom. Use the sliders to add about 20 atoms each ofCarbon-12andCarbon-13to the chamber.1.In the mass spectrometer, atoms are vaporized (turned into a gas) and ionized (stripped ofelectrons). The charged particles are then shot through a tube surrounded by electromagnets. ClickRelease atomsand observe the particles as they hit the detector.1is

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Term
Spring
Professor
NoProfessor
Tags
Atom, Isotope, mass spectrometer