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Ionic Bonds Student Exploration Sheet - Document preview page 1

Ionic Bonds Student Exploration Sheet - Page 1

Document preview content for Ionic Bonds Student Exploration Sheet

Ionic Bonds Student Exploration Sheet

Explore ionic bonds through a fun simulation! Learn how atoms share or transfer electrons to form bonds, using examples with markers to understand balance and the octet rule.

Alice Edwards
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Ionic Bonds Student Exploration Sheet - Page 1 preview image” 1 GizmosName:DateStudent Exploration: Ionic BondsDirections: Follow the instructions to go through the simulation. Respond to the questions andprompts in the orange boxes.Vocabulary:chemical family, ion. ionic bond, ionization energy, melall. nonmelal. oclet ruleshell, valenceelectronPrior KnowledgeQuestions (Do lhese BEFORE usinglheGizmo.)1.Nate and Clara are drawing pictures with markers. There are 8 markers in a set. Nate has 9 markers andClara has 7. What can Nale and Clara do so lhat each of them has a full set?Nate can give 1 marker Io Clara so that each ot them has a full set.2.Maggie is sitting at a table with Fred and Florence. Maggie has 10 markers, but Fred and Florence eachhave only 7 markers. Hov; can they share markers so each has 8?Maggie can give 1 marker to Fred and 1 marker Io Florence, allowing all 3 of them to have 8 markers.Gizmo Warm-upJust like students sharing markers, atoms sometimes share or swap eleclrons. By doing this, atoms formbonds. The /onfcBondsGizmo allows you Io explore how ionic bonds form.To begin, check that Sodium (Na) and Chlorine {Cl) are selected from lhemenus at right. Click Play (* ) Io see electrons orbiting the nucleus of eachatom. (Note: These atom models are simplified and not meant Io be realistic.)*1.Each atom consists of a central nucleus and several shells lhat containelectrons. The outermost electrons are called valence electronsHow many valence eleclrons does each atom have?Sodium:1Chlorine:72.Click Pause ("). Elements can be classified as metals and nonmetals. Metals do not hold on to lheirvalence electrons very tightly, while nonmelals hold their eleclrons lighlly. Ionization energy is a measureof how tightly lhe valence electrons are held.A.Try pulling an electron away from each atom. Based on this experiment, which atom is a metal?SodiumWhich is a nonmetal?ChlorineBTry moving an electron from the metal to the nonmetal. Whal happens?
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Ionic Bonds Student Exploration Sheet - Page 2 preview imageThe sodium losesanelectron and becomes a cation,whilethe chlorine gains anelectron and becomes ananion.Activity A:IonsGet the Gizmo ready:Click Reset.Check that sodium and chlorine are still selected.V* • *’ *1Introduction:Some of the particles that make up atoms have an electrical charge. Electrons are negativelycharged, while protons are positively charged. Particles with opposite charges (+ and -) attractwhile particleswiththe same charge (+ and + or - andrepel.Question: Whathappens when atoms gainorlose electrons?1.Count: Electrons movearound thenucleus of atoms in specific shells, shown bytherings around the atomsin the Gizmo. The firsi ring holds two electrons, and the second holds eight. (If you like, you can hide theinner electrons by selecting Hide inner electrons.)A.Observe the sodium and chlorine atoms. How many electrons are there total in each atom?Sodium:11 ElectronsChlorine:17 ElectronsBEach atom is neutrally charged, which means that each atom has the same number of protons andelectrons. Based on this, how many protons are in each atom?Sodium:11 ProtonsChlorine:11 Electrons2.Observe: Most atoms are stable with a configuration of eight valence electrons. This is known as the octetrule. How many va/ence electrons does each atom have?Sodium:1Valence ElectronChlorine:7 Valence Electrons3.Form a bond: Each electron has a charge of 1-, and each proton has a charge of 1+. You can calculate thecharge of an atom by subtractingthenumber of electrons from the number of protons. Move an electronfrom the sodium Io the chlorine atom.A. What are lhe charges of each atom now?Sodium:+1Chlorine:-1Turn onShowcharge Io check. These charged atoms are calledionsB. Is each ion stable? Explain.Each ion is currently stable. Chlorine has 7 valence electrons, so gelling 1 morevalence electron from Sodium would make it stable. Sodium has 1 valence electron,so giving its extra valence electron to Chlorine can make both stable.Click Check inlhelower right corner of the Gizmo to check.4.Thinkand discuss: Why is there an attraction between the two ions in this chemical bond?
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Ionic Bonds Student Exploration Sheet - Page 3 preview imageThis chemical bond holds an attractionwilh2 ions because of the fact that one atom is a positivelycharged cation and one atom is a negatively charged anion. We know that opposite forces attract,which is why this chemical bond has an attraction.Activity B:Ionic compoundsGettheGizmojeady:Click Reset .TurnoffShowchargeSelectLithium(Li) andOxygen(0).:Question: Howare ionic compounds formed?1.Observe: Look atthepurplelithiumatom and the red oxygen atom. Recall that most atoms are stable whentheir outermost ringhaseight electrons. Some atoms, such as lithium and beryllium, are stablewhen theiroutermost ring has two electrons.AHow many electrons will the lithium atom give up io become stable?1ElectronB.How many electrons doestheoxygen atom need to become stable?2 ElectronsC. Can a stable compound be made from these two atoms? Explain why or why not.These two atoms can't make a stable compound. Oxygen would need 2 electrons tobecome stable, but Lithium cannot give? electronswhilestill stable, meaning thalforming a stable compound wilh these two atoms is impossible.2.Form bonds Click Add metal Io add another lithium atom, and then transfer electrons from the lithium iothe oxygen. ClickCheck.A. Did you make a stable compound?YesB. Turnon Showformula.What is the formula of this compound?U2OC. Turn onShowcharge. Whatisthe charge of each ion? Li+1Li-2O1+3.Practice: UsetheGizmo to create stable compounds fromthecombinations given below. After transferringelectrons, arrangetheatoms to demonstrate the attraction between positively charged ions and negativelycharged ions. Click Check io check each compound.For each compound, click the camera( Qi icon to lake a snapshot. Right-click theimage,and click CopyImage. Paste each image into a blank document Io turn in with this worksheet. Write the ionic charges(such as Ca2+) and chemical formulas below.IonicchargesChemicalformulaA. Lithium and fluorine:Li+1F-1LiF
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