slide 1 of 15 © copyright pearson prentice hall naming and writing formulas for molecular compounds...

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© Copyright Pearson Prentice Hall

Naming and Writing Formulas for Molecular Compounds

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Carbon and oxygen combine to form _________ _________

(CO) and _________ ___________ (CO2), but these two

invisible gases are very different.

9.3 Naming Binary Molecular Compounds

Sitting in a room with small amounts of CO2 in the air would not present any problems. If the same amount of CO were in the room, you could die of asphyxiation. A naming system that distinguishes between these two compounds is needed.

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A prefix in the name of a binary molecular compound tells how many atoms of an element are present in each molecule of the compound.


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Some guidelines for naming binary

_______________ compounds:

• Name the __________ in the

________ listed in the ___________.

• Use __________ to indicate the

_________ of each kind of ________.


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• Omit the prefix _________- when the

formula contains only one atom of the

_________ _____________ in the

name.

• The suffix of the name of the ________

element is -_______.


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Name the following molecular compounds:

a.PCl5 b. CCl4 c. NO2 d. N2F2

e. P4O6 f. XeF2 g. SiO2 h. Cl2O7

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> Writing Formulas for BinaryMolecular Compounds

Writing Formulas for Binary Molecular Compounds

How do you write the formula for a binary molecular compound?

9.3

Use the _______ in the name to tell you the

__________ of each ____________ in the

formula. Then write the correct symbols for

the two elements with the appropriate

subscripts.

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Silicon carbide is a hard material like

diamond. The name silicon carbide has no

___________, so the _____________ of

silicon and carbon must be one. Thus, the

formula for silicon carbide is ___________.

9.3 Writing Formulas for BinaryMolecular Compounds

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Write the formulas for the following binary molecular compounds:

a.nitrogen tribromide

b.dichlorine monoxide

c.sulfur dioxide

d.dinitrogen tetrafluoride