Warm Up

• What type of ion does Calcium form?Anion or Cation

• Does it gain or loose electrons and how many?

• Write the formula for the ion that calcium forms:

• Write the individual ions and then the chemical formula for Calcium iodide:

• Write the individual ions and then the chemical formula for Calcium phosphide:

6.5

Molecular Compounds• Composed of two non-metals that share

electrons• Prefixes help to distinguish the amount of each

element present in a compound

Naming covalently bonded elements requires you to indicate the amount of each element present!!!

(There are no ions to indicate how many of each element there is!!!)

Prefixes to memorize:mono- 1 hexa- 6di- 2 hepta- 7tri- 3 octa- 8tetra- 4 nona- 9penta- 5 deca- 10

Naming (Nomenclature) Rules

1st- Check to see if the compound is ionic or covalent(metal + nometal) (two non-metals)

2nd - If 2 nonmetals then use the following set up.

Naming (Nomenclature) Rules

Example: N2O : Dinitrogen monoxide

2 nitrogens 1 oxygen

Numeric Prefix + name 1st element numeric prefix + name 2nd element+ide

** No prefix is given to the first element only if there is only 1 of that element present in the compound!!!**

Example: CO : Carbon monoxide

Now it’s your turn!!!

• Name the following: CCl4

P2O5

N2O3

• Write the chemical formula for the following: Carbon dioxideDichlorine heptoxide

Is it Ionic or Covalent???

Ionic• Metal + nonmetal• Names have no numeric

prefixes

Covalent• 2 nonmetals• Names will have numeric

prefixes

Ionic or covalent???

• Sodium Chloride• Carbon tetrachloride• Na2O

• NO

• Ionic• Covalent• Ionic• Covalent

Reminder:

When naming a chemical using the formula given1. Identify if it is ionic or covalent2. Use the naming rules

Writing formulas1. Identify if it is ionic or covalent based on the name2. Ionic compounds will require you to figure out

charges and cross multiply. Covalent molecules give you the amounts in the name

Name the following chemicals

• N2F2

• AlCl3

• ClO4

• K2S

• S2F10

• Dinitrogen difluoride• Aluminum chloride• Chlorine tetraoxide• Potassium sulfide• Disulfur decaflouride

Write the formula for the following chemicals

• Lithium sulfide• Diphosphorus trioxide

• Li2S

• P2O3

6.6 Naming Common Acids• Acids produce H+ ions when dissolved in water

Binary Acids: H+ ions paired with an Anion (-)

Naming: HCl 1) Prefix hydro-2) anion – suffix – ic chlorine chloric3) Add term acid

Example: HCl hydrochloric acid

Your Turn!!

Name: H2S

HBr

Write the formula: Hydrofluoric acidHydrophosphoric acid

Oxyacids• H+ ion and an oxyanion

Oxyanions: a polyatomic ion that contains oxygen

Naming: Use the polyatomic ion name only!Change suffix of the polyatomic ion according to the following

rules:

- ate ending turns to – ic NO3- HNO3 nitric acid

- ite ending turns to – ous NO2- HNO2 nitrous acid

** see list on page 160** Be familiar with those acids

Time to Practice !!!