Unit 6 – Chemical Bonds SPS1b. Compare and contrast ionic bonds in terms of electron position....
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Transcript of Unit 6 – Chemical Bonds SPS1b. Compare and contrast ionic bonds in terms of electron position....
![Page 1: Unit 6 – Chemical Bonds SPS1b. Compare and contrast ionic bonds in terms of electron position. SPS2b. Predict formulas for stable and binary ionic compounds.](https://reader036.fdocuments.us/reader036/viewer/2022062304/56649e2d5503460f94b1c3fe/html5/thumbnails/1.jpg)
Unit 6 – Chemical Bonds
SPS1b. Compare and contrast ionic bonds in terms of electron position.SPS2b. Predict formulas for stable and binary ionic compounds based
on balance charges.SPS2c. Use IUPAC nomenclature for transition between chemical names
and chemical formulas.
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What part of the ATOM makes the bonding of two elements possible?
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Unit 6 Activator • Work in groups of 4. • One student per group chooses an element
from Group 1, 2, 17, or 18. Each student should pick a different group to pick from.
• The other students in the group then find that element on the periodic table and determine how many outer electrons the element has.
• HINT: you could draw a Bohr Model to help you figure this out.
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Bohr Model Refresher
Energy Level 1
2
8
18
Energy Level 2
Energy Level 3
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Unit 6 Activator AnswersGroup 1 Group 2 Group 17 Group 18
Most Reactive NON Reactive
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TOD/HWUsing your Student Learning Map
• On a piece of paper use Unit 6 Standards and Elements –Standard is the SPS#–Element is the a,b,c part
• Take the standards and create a brace map – breaking down the standards and the elements.
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Bridge Map Analogies
• Define:– Atoms:
– Compound:
• Create an analogy of your own.
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Unit 6 – Chemical Bonds
SPS1b. Compare and contrast ionic bonds in terms of electron position.SPS2b. Predict formulas for stable and binary ionic compounds based
on balance charges.SPS2c. Use IUPAC nomenclature for transition between chemical names
and chemical formulas.
![Page 9: Unit 6 – Chemical Bonds SPS1b. Compare and contrast ionic bonds in terms of electron position. SPS2b. Predict formulas for stable and binary ionic compounds.](https://reader036.fdocuments.us/reader036/viewer/2022062304/56649e2d5503460f94b1c3fe/html5/thumbnails/9.jpg)
ACTIVATOR:Answer the 2 (red)
questions in your notes
• Jigsaw puzzles can have hundreds or thousands of pieces. To complete the puzzle, you need to infer how each piece fits together. Size, shape, and markings all give clues as to how the pieces should be placed to make a picture.
1. Where do the remaining pieces belong? How do you know?
2. How might a compound and its individual elements compare to a puzzle and its pieces?
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The magic number for valance electrons is what?
8
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Octet (8)Rule…..
• An atom is chemically stable when its outer energy level is COMPLETE.
• Elements are stable when they contain EIGHT valence electrons.
• The exception is Hydrogen and Helium that are stable with TWO electrons.
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The magic number for valance electrons is what?
8
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What charge is an electron?
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Electron Dot diagrams• A way of keeping track of
valence electrons.• How to write them• Write the symbol.• Put one dot for each valence
electron• Don’t pair up until they have
to
X
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The Electron Dot diagram for Nitrogen
Nitrogen has 5 valence electrons.
First we write the symbol.
NThen add 1 electron at a time to each side.Until they are forced to pair up.
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Example
• Draw a dot diagram for Be:
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TOD!
• Complete the dot diagrams• OMIT – chemical formulas on Back Side!
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ACTIVATORWrite the electron dot diagram for
Na
Mg
C
O
F
Ne
He
I
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Unit 6 Introduction Foldable – pg 604
• How many valence electrons does an atom want to have?–8– Make 8 flaps on foldable– Label Out side of Flaps
• Group 1• Group 2• Group 13• Group 14• Group 15• Group 16• Group 17• Group 18
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Inside of Flaps• Write the correct number of Valence Electrons that goes with the group number
• Group 1 =• Group 2 =• Group 13 =• Group 14 =• Group 15 =• Group 16 =• Group 17 =• Group 18 =
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Complete the worksheet!
• Front side is examples of single atom dot diagram.
• 1 – 20 (omit any transition metals)• And top chart on back.• STOP when done!• You do not do the bottom chart (YET!)
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Create a BAR Graph forGroups (1, 2, 13, 14, 15, 16, 17, 18)
vs. Number of Valence Electrons
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Graph!
• Turn in TOD!
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TOD• Answer today's essential question
(EQ) and turn in. • EQ: How does the interaction of valence
electrons form chemical compounds?• What type of bond is this?
• Draw the dot diagram for the compound formed using:• K and Br
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ACTIVATOR• Draw the dot diagram for the compound
formed using:#1- K and Br
#2 - Mg and S#3 – Na and F
• What type of bonds are formed with both of these compounds?
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• Na and Cl• Ca and Se
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Complete Part 2 from yesterday
• Bottom data table!• Omit Cl and Cl• Omit At and At• Omit Chemical Formula Column • TURN IN as TOD• Entire Paper Graded Tonight
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Dot Diagrams Showing Chemical Compounds
Elements Compound Formed Type of Bond Chemical Formula
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KEEP your current event !You can use it for next Monday.
• GET CLICKERS• PERIODIC TABLE OUT• NOTE BOOK OUT AND OPEN
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Activator: copy chart and complete in your notes section
Element Group # Valence Electrons
Gain or Lose Electrons To Get to 8
How many electrons being gained or lost
Oxidation number and charge
Cation or an Anion
RbSrGaNTeBrKr
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GET 8 – EIGHTDifferent Colors
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Color Code: Groups vs. Valence Electrons
OMITOMIT
KE Group 1= 1 V.E.Group 1 = 1 V.E.
Add Oxidation NumbersGroup 14 +/- 4
Oxidation Numbers on Bottom
Valence Electrons on Top
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Activator: copy chart and complete in your notes section
Element Group # Valence Electrons
Gain or Lose Electrons To Get to 8
How many electrons being gained or lost
Oxidation number and charge
Cation or an Anion (we will come back and do this column)
LiMgBSClK
Mg
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What is a bond? (define in your own words)
• A chemical bond is the force that holds atoms together in a compound.
• A chemical bond is not permanent.
• Two types of bonds:– Ionic “taking or gaining”– Covalent “sharing”
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What is an ion? (define in your own words)
• An ion is a charged particle because it now has either more or fewer electrons than protons.
• It’s the electrical forces between oppositely charged particles, such as ions that hold compounds together.
Draw the ion for Na and Cl if they formed a compound.
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Ionic Bonds• Ionic bond – is when an atom gains or loses
electrons (Keep in mind that electrons are -)• These bonds form between metals and non-
metal.• For example GROUP 1 bonds with GROUP ?• When an atom loses an electron (-) it becomes
over all Positive making a CA+ION• When an atom gains an electron (-) it
becomes over all Negative making a ANION
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Chemical Compound Formation
Use these words to complete the flow map: Anion, cation, compound, bond, ion ,neutral, and define each!
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Use your textbook (BLUE) to create a Double Bubble for Ionic Bonds (pg. 610) vs.
Covalent Bonds (pg. 611) Use page 608 for similarities.
IONIC COVALENT
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Marriage
Divorce
Forming of a bond is like marriage
•More stable
•exothermic
The breaking of a bond relates to a divorce.
•Less stable
•Endothermic
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Ionic Bonds•What is an Ionic Bond?
- An Ionic Bond is a chemical bond resulting from the TRANSFER of electrons from one bonding atom to another
• When is an ionic bond formed?- An ionic bond is formed when a cation (positive ion) transfers electrons to an anion (negative ion).
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What are some characteristics of an ionic bond?
1. Crystalline at room temperatures
2. Have higher melting points and boiling points compared to covalent compounds
3. Conduct electrical current in molten or solution state but not in the solid state
4. Polar bonds
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Covalent Bonds•What is an Covalent Bond?
- A covalent bond is a chemical bond resulting from SHARING of electrons between 2 bonding atoms.
• What forms a covalent bond?- A covalent bond is formed between two nonmetals.
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What are some characteristics of a covalent bond?
1. Covalent bonds have definite and predictable shapes.
2. Very strong3. Low melting and boiling
points
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Practice Identifying:Ionic Bond or Covalent Bond
1. CaCl2 11. MgO I2. CO2 12. OMIT3. H2O 13. HCl4. OMIT 14. KI5. K2O 15. OMIT6. NaF 16. NO27. OMIT 17. OMIT8. CH4 18. FeCl39. SO3 19. P2O510. LiBr 20. N2O3
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ANSWERS
CaCl2 IONIC 11. MgO IONIC2. CO2 COVALENT 12. NH4Cl BOTH3. H2O COVALENT 13. HCl COVALENT4. BaSO4 BOTH 14. KI IONIC5. K2O IONIC 15. NaOH BOTH6. NaF IONIC 16. NO2 COVALENT7. Na2CO3 BOTH 17. AlPO4 BOTH8. CH4 COVALENT 18. FeCl3 IONIC9. SO3 COVALENT 19. P2O5 COVALENT10. LiBr IONIC 20. N2O3 COVALENT
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ActivatorWrite and Answer the following questions in your notebook.
1. What is an ion?2. What is an ionic bond?3. What is a covalent bond?4. What is a valence electron?5. What is the oxidation number for K?6. What is the oxidation number for F?7. Which one K or F is the cation?
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New Topic
• EQ: How are the names and formulas of ionic compounds written?
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1+2+ 3+ 4+ 3- 2- 1-
0
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Use the information and create a flow map.
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Now flip paper over and we will complete together.
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Activator Practice Examples Element Oxidation # Element Oxidation # Chemical
Formula
Potassium Chlorine
Calcium Chlorine
Sodium Oxygen
Boron Phosphorus
Lithium Sulfur
Aluminum Oxygen
Beryllium Iodine
Calcium Nitrogen
Sodium Bromine
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• Chemical Compound • TEST• Friday
• January 19th
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Atomic Trading Cards
•Get a BLUE book•Turn to Page 607
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Take out a piece of paper.• Take notes over the video – Chemical
Bonding.• At least 10 facts. • After the video you will have a quiz.
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Define
1. Atom2. Ion3. Force4. Compound5. Atomic Stability6. Octet Rule7. Valence Electrons
8. Chemical Bond9. Ionic Bond10. Covalent Bond11. Oxidation Number12. Neutral
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Take your element card and
• Create a table like the following Element 1 Element 2 Covalent/Ionic Formula
Get with three people and complete the table in your notes.
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Activator• Make a bridge map for the following:
IonicTaking
CovalentSharing
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Activator• Write the questions and the answers in your
notes section.• What groups do CARBON and SILICON belong
to?• Are these two elements more likely to gain
electrons, lose electrons, or share electrons when they form compounds?