Drill Quiz:

There are … carbon atoms represented by 3 Mg(HCO3)2.

Identify two parts of an ionic compound. In the compound Al2O3, the ratio of aluminum to

oxygen is.. Objective:

Swbat: Use knowledge of covalent nomenclature in order to name and write formulas of covalent compounds.

SAT Enrichment: 12/1

The formula H2 represents one…

a. Mole.

b. atom.

c. liter.

d. Molecule.

e. Gram.

Engagement:

Reading: Carbon Monoxide Leak Kills Three in Cove Village

Students will complete the worksheet that goes with the assignment.

Guided discussion on the naming of covalent compounds being different from ionic compounds.

Naming Molecular Compounds

Chemical Bonds

Three basic types of bonds: Ionic

Metals and nonmetals Electrostatic attraction

between ions Covalent

Nonmetals only Sharing of electrons

Metallic Metal atoms bonded to

several other atoms

Common Names

A lot of chemicals have common names as well as the proper IUPAC name.

Some chemicals that should always be named by common name and never named by the IUPAC method are: H2O water, not dihydrogen monoxide

NH3 ammonia, not nitrogen trihydride

CH4 methane, not carbon tetrahydride

Remember:

BrINClHOF

These elements only exist as PAIRS. Note that when they combine to make compounds, they are no longer elements so they are no longer in pairs!

More Common Names - Elements that exist as diatomics

How do I name Covalent Compounds?

Prefix System (binary compounds)

1. Less electronegative atom comes first.

2. Add prefixes to indicate # of atoms. Omit mono- prefix on the FIRST element. ALWAYS add a prefix in front of the second element.

3. Change the ending of the second element to -ide.

PREFIXmono-di-tri-tetra-penta-hexa-hepta-octa-nona-deca-

NUMBER123456789

10

Latin Prefixes

Roots of Nonmetals

H hydr- C carb- N nitr- P phosph- O ox- S sulf-

Se selen- F fluor- Cl chlor- Br brom- I iod-

Practice: Name the following covalent compounds

1) CO - 2) SO2

3) SO3 4) N2O

5) NO 6) N2O3

7) CCl4 8) P5H10

9) SiH5 10) O3F6

Practice: Name the following covalent compounds

1) CO – Carbon Monoxide 2) SO2 – Sulfur Dioxide

3) SO3 – Sulfur Trioxide 4) N2O – Dinitrogen Monoxide

5) NO – Nitrogen Monoxide 6) N2O3 – Dinitrogen Trioxide

7) CCl4 – Carbon Tetrachloride

8) P5H10 – Pentaphosphorus Decahydride

9) SiH5 – Silicon Pentahydride

10) O3F6 – Trioxygen Hexafluoride

Writing Binary Covalent Formulas

Write the symbols for the elements in the order mentioned in the name.

Write subscripts indicated by the prefixes. If the first part of the name has no prefix, assume it is mono-.

Your turn: Write the formulas for the following compounds

1) Dihydrogen Dioxide 2) Pentaphosphorus Decachloride

3) Sulfur Tetroxide 4) Nitrogen Trihydride

5) Nitrogen Tetrahydride 6) Trinitrogen Nonahydride

7) Disulfur Dichloride 8) Hexaselenium Tetraphosphide

Your turn: Write the formulas for the following compounds

1) Dihydrogen Dioxide – H2O2

2) Pentaphosphorus Decachloride – P5Cl10

3) Sulfur Tetroxide – SO4 4) Nitrogen Trihydride – NH3

(bonus points if you said ammonia!)

5) Nitrogen Tetrahydride – NH4

6) Trinitrogen Nonahydride – N3H9

7) Disulfur Dichloride – S2Cl2

8) Hexaselenium Tetraphosphide – Se6P4

Class work

Writing and naming covalent compounds practice.

Summary

Did we accomplish the objective? Explain.

Identify the location of nonmetals on the periodic table.

Identify the elements involved in a covalent bond.

Compare and Contrast naming ionic and covalent bonds.

Extension

Homework: Instructional Fair page 46.

Exit ticket Complete and place in the bin when finished.

Drill Quiz:

Name the following:1. CCl42. NO2

3. PCl5There are … carbon atom

Objective: Swbat: Use knowledge of covalent

nomenclature in order to name and write formulas of covalent compounds.

SAT Enrichment:

The formula for … is …

a. ditin hydroxide…Sn(OH)2

b. triphosphorous chloride … PCl3

c. tetraiodine nonoxide … I4O9

d. nitrogen (II) oxide … N2O

e. dichloride octoxide … Cl2O8

WebQuest

Working independently No More Pain: The Chemistry of Headache of

Medicines

Bingo

Nomenclature Bingo I will call out the covalent or ionic formula and

you will place a chip on the name. I will call out the covalent or ionic name and you

will place a chip on the formula. Five in a row, five across, or four corners wins!