Bellwork 11-13-2014Honors

Have homework out – case studies

Take out your note-taker from yesterday on the three types of bonds

1.Use as much information as you can from the evidence you gathered yesterday to describe the difference between ionic and covalent bonds.

Bellwork 11-13-2014Have out your lab notebook to be collected

Have out packet on ionic and covalent bonding (Per. 5 and 6)

1. Fill in the T-chart to describe the difference between ionic and covalent bonds.

Ionic Covalent

AnnouncementsTurn in lab report – honors

Lab make up Friday Nov. 14

InterventionComing into class unprepared will no longer be

tolerated I expect you come in quietly and get started on the

bellwork Anyone being loud or not starting on the bellwork will

cause the whole class to go out and try again

WarningsYou will get two yellow cards, a third equals a red and

a summative quiz

WarningsTalking after I call for your attention (normal signal –

clap once, clap twice)5 sec and then warning

Talking while I am talking or a classmate is talking/giving an answer

iPad out when not necessary – ask me first if you need to use it for something in class

Excessive loudness during group work

Distracting behavior – out of seat, messing around with materials when not instructed to, excessive laughing or loud annoying noises

You will be accumulating evidence for each type of bond:Non-polar covalentPolar covalentIonic

You will work on one type of bond at a time for 10 minutes and share your results

Use the evidence with your group to come up with information to fill out your note-taker

Ionic vs. Covalent wrap up

Example C-C bond

Use information you know or information on your desk to fill out all of the information on non-polar covalent bonds

Non-polar covalent

Example H-N bond

Use information you know or information on your desk to fill out all of the information on polar covalent bonds

Polar Covalent

Example K-Cl bond

Use information you know or information on your desk to fill out all of the information on ionic bonds

Ionic

Case Studies#1

1. Polar covalent

2. C-O, C is slightly positive and O is slightly negative

3. Electronegativity difference is medium.

4. Would not conduct electricity because electrons are shared and they do not break up in solution to full positive and full negative charges.

5. Lower melting point than ionic because the bonds are weaker than ionic bonds

Case Studies#2

1. Ionic because there are full positive and negative charges on the atoms in the network

2. Ba+, O-

3. Metals and nonmetals

4. Yes because the atoms would dissociate into positive and negative ions when dissolved.

5. The electronegativity difference is high causing it to have a high melting point because the bond is very strong between positive and negative ions.

Videoshttps://www.youtube.com/watch?v=pj0F-

zv79rM

https://www.youtube.com/watch?v=QqjcCvzWwww

Summative WritingTake out a blank sheet of paper

Put everything else away EXCEPT your note-taker

This is an independent assignment, plagiarism is cheating and will receive a zero.

Answer #1 in 5-7 sentences and underline keywords (use all in each question)!

Scoring 4 – All keywords are used and underlined, meets minimum length requirements, all ideas are described in detail and accurate.

3 – A few keywords missing or not underlined, 1 or 2 sentences short, all ideas are described accurately.

2 – Half of the the keywords are missing, 3 or 4 sentences short, ideas are somewhat accurate.

1 – Only a couple keywords are used, only 1 or 2 sentences in length, ideas are inaccurate.

0 – Assignment missing

Summative Writing Assignment

1. Describe the similarities and differences between a IONIC bond and a POLAR COVALENT bond.

2. Draw an example of each type of bond with any charge that is associated with each atom.

Keywords: electronegativity difference, electrons, metal/nonmetal, dissociation (separation), shared/unshared, charge (+, -, δ+, δ-), electrical conductivity.

Bellwork 11-17-20141. In the ionic compound LiF, which

element is the metal and which is the non-metal?

2. Which element gets the positive charge, metal or non-metal?

3. Which element gets the negative charge, metal or non-metal?

Bellwork Honors 11-17-2014

1. Is lithium a metal or non-metal? What is its charge (how many electrons does it give away)?

2. Is oxygen a metal or non-metal? What is its charge (how many electrons does it want)?

3. How many lithium ions would it take to complete Oxygen’s octet?

Ionic Bonding Lab Notes

Metals lose electrons and become positive ions or cations.

Non-metals gain electrons and become negative ions or anions.

Depiction

+ Cation

- Anion

Chemical Formulas: you try

Oxygen is in group 6 and needs 2 more electrons to fill its shell. Once it gains 2 electrons, it will have a -2 charge.

Magnesium is in group 2 and wants to give away 2 electrons to arrive at a full shell. Once it gives up these 2 electrons, it will have a +2 charge

Atom vs. Ion Size

Cations get smaller as they lose electrons, anions get larger as they gain electrons

Chemical formula writingThe subscripts show the ratio of each

atom in the compound.

For an ionic bond, the subscripts, or number of each atom in the compound, need to balance the charges on the ions. The subscript of each ion changes to make the compound neutral. The chemical formula shows how many of each ion are needed to balance the charges between both ions and make the compound neutral.

NamingCation name stays the same

Anion name changes the ending to –ide

Example:Cation + anion = Magnesium Chloride

Lab Time!1. Get out your lab notebook and write

down the title for the lab

ONE LAB NOTEBOOK PER PAIR

2. Write the title and a question for the lab

3. Copy the data table into your notebook: you will be creating 12 compounds

4. You will be working with one partner (next to you) today, otherwise your lab will not be graded

Cut out piecesCut out the pieces on the purple sheet I

handed out

IGNORE THE WILDCARDS – YOU WILL NOT NEED THESE

Your goal is to complete 12 neutral compounds and fill out the chart you created in your lab notebook.

Make a PosterWith your partner:

On a separate sheet of paper, paste or tape down 5 compounds that you made.

Label them with their chemical formula and their ionic compound name.

Discussion QuestionsYou have 15 minutes now to answer

discussion questions in class

Come show me when you AND your partner are finished, I will only check you off if you are both done!

If you do not finish, this is homework

Kahoot ReviewLog on to Kahoot.it!

Monoatomic Ionic Compounds

So far we have only been looking at monoatomic ionic compounds compounds with only one element of each ion

Ex. Na2O

Na+1 and O-2

Polyatomic Ionic Compounds

These are ionic compounds containing ions with multiple elements

Poly = many

Ex. NaNO3

Na+1 NO3-1

Naming Polyatomic Ionic Compounds

Criss-Cross Method:

Write out the two ions you are using in the compound (cation first)

Write the charges they would receive above each one

Cross the cation charge to to the anion subscript and the anion charge to cation subscript

Example 1 – Monoatomic

Calcium Bromide

Ca Br

Ca1Br2

CaBr2

+2 -1

Example 2 – Polyatomic

Magnesium Phosphate

Mg PO4

Mg3 PO4 2

Mg3(PO4)2

+2 -3

Try These!1. sodium bicarbonate 8. aluminum (III) sulfate

2. sodium fluoride 9. silver (II) nitrite

3. iron (III) chloride 10. calcium sulfate

4. sodium carbonate

5. copper (II) sulfate

6. magnesium hydroxide

7. barium nitrate

Name These!Mg2SO4

Ca(NO3)2

Li3PO4

NaClO2

(NH4)2CO3

Fe(OH)2

HomeworkFinish lab questions if you did not

finish in class

Homework on writing and naming ionic compounds