MAYHAN Ch. 7-8 Review Sheet. 1. What are the properties of IONIC substances? These substances:...
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Transcript of MAYHAN Ch. 7-8 Review Sheet. 1. What are the properties of IONIC substances? These substances:...
MAYHAN
Ch. 7-8 Review Sheet
MAYHAN
1. What are the properties of IONIC substances?
These substances:-Solid Hard and brittle (like salt) at room temp-Conduct electricity when dissolved in water -High boiling/melting points
MAYHAN
2. What are the properties of COVALENT substances?
These substances:-MOST are liquids/gases at room temp-Do not conduct electricity when dissolved in
water -Most can not dissolve in water-Low boiling/melting points
MAYHAN
3. What’s the difference between ionic BONDING and covalent BONDING?
Ionic CovalentTransfer electrons Shared electrons
Metal/nonmetals Nonmetals
Has a charge No charge
Single bonds only Can have double/triple bonds
MAYHAN
4. Why do atoms form bonds?
Atoms are trying to fill their valence orbit with a stable octet of electrons- in the case of hydrogen it’s a duet
MAYHAN
5. What are diatomic molecules? Name 7 of them.
Diatomic molecules are molecules that are made up of 2 identical atoms to become a molecule.H2, N2, O2, F2, Cl2, Br2, I2
KNOW THESE!!!~!!!
MAYHAN
6. How many electrons are involved in covalent bonding?____
2 shared electrons or a pair of electrons
MAYHAN
7. What is bond dissociation energy?
The energy needed to separate a covalent bond
MAYHAN
8. What properties determine bond strength?
C-C longer and weakerO=O not so long and strongerN=N short and strong
MAYHAN
9. Provide the Lewis structure, the VSEPR shape and determine the polarity for the following
Lewis Structure
VSEPR shape IMF
SO3
CI4
SeO2
HF
Trig planar DD
Dispersion
HB
DD
Tetrahedral
Bent
Iinear
MAYHAN
10. What are the 10 prefixes to molecular compound naming?
Mono- 1Di- 2Tri- 3Tetra- 4Penta- 5Hexa- 6Hepta- 7Octa- 8Non-9 Deca- 10
MAYHAN
11. What is the difference between a nonpolar covalent bond and a polar covalent bond?
Provide an example.Nonpolar covalent bond is where the electrons are shared equally between the atoms. Ex: Cl-Cl
Polar covalent bond is where the electrons are not shared equally between the atoms. Ex: H-Cl
MAYHAN
12. Can a molecule have polar covalent bonds and be nonpolar? Explain your answer.
Yes, they can.
BUT it does have polar bonds
Overall– Nonpolar molecule
MAYHAN
13. Match the following- answers can be used more than once or have multiple answers.1. Induced dispersion 2. Dipole-dipole 3. Hydrogen bonding a. H-H _____ e. nonpolar covalent____b. H-F _____ f. polar covalent____ c. C-Cl____ g. attraction to nucleus & electrons ___d. O-O ____ h. attraction to adjacent atoms___
1321
12 or 3
11, 2, 3
MAYHAN
Name or FormulaIonic or
Covalent ANSWER
Li2O
Nitrogen dibromide
SBr6
Aluminum phosphide
Boron sulfide
SO2
CN2
Potassium nitride
Chlorine trifluoride
Nitrogen disulfide
Magnesium phosphide
Ionic Lithium oxide
Covalent NBr2
Covalent Sulfur hexabromide
Ionic AlPIonic B2S3
Covalent Sulfur dioxideCovalent Carbon dinitride
Ionic K3NCovalent ClF3
Covalent NS2Ionic Mg3P2
MAYHAN
I Can
• Describe covalent bonding. • Provide the names or formulas for molecules. • Draw Lewis dot structures of molecules. • Use Lewis dot structures and VSPER theory to
determine the shape of a molecule. • Predict the intermolecular forces between
molecules by using molecular shapes.
MAYHAN
To Know List- Ch. 3-9
• Look at your reading notes from Ch. 9– 9.1- Covalent bonds
• Why bonds form?• Diatomic Molecules- Name them.• Lewis structures- bonding verse lone pairs• Double/Triple bonds• Bond length verse bond strength
MAYHAN
To Know List- Ch. 3-9
• Look at your reading notes from Ch. 9 (75%)– 9.2 and 9.5 – Naming and Molecular structure
• Binary molecules- what are they?• Naming molecules- Prefixes and rules for mono• 3 Exceptions to the octet rule• Know the 8 basic shapes of Molecules• Electronegativity and polarity relationship• Non polar molecules vs Polar molecules
MAYHAN
To Know List- Ch. 3-9 Test• Concentration of MOSTLY Ch. 9 (75%)
– Ionic Bonding- Ch. 8• Ionic Bonding• Naming/Formula of ionic substances• Properties of Ionic bonds
– Periodic trends- Ch. 6– Energy levels-light, E-dot/valence-Ch. 5– Particles- Protons, Electrons Neutrons-Ch. 4– Physical chemical properties/changes-Ch. 3
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