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Vocab
Key Questions
Lesson Check Q's
Formulas
100

What is a binary compound? 

A compound composed of two elements. 

100

How can you determine the charges of monatomic ions?  

The charge of any ion of a group A nonmetal is determined by subtracting 8 from the group number.

100

How can you determine the charges of metal cations? 

By subtracting it from the group number. 

100

HCl

Hydrochloric Acid 

200

What is monatomic compound? 

Consists of a single atom with a positive or negative charge resulting from the loss or gain of one or more valence electrons. 

200

How do polyatomic ions differ from monatomic ions? 

Unlike a monatomic ion, a polyatomic ion is composed of more than one atom. But like a monatomic ion, a polyatomic ion behaves as a unit and carries a charge.

200

Write the symbol or formula (including the charge) for a nitrate ion. 

NO3-

200

NCl3

Nitrogen Trichloride

300
What is an acid? 

A compound that contains one or more hydrogen atoms and produces hydrogen atoms when dissolved in water.  

300

How do you determine the formula and the name of a compound with a polyatomic ion?


First write the symbol for the cation followed by the symbol for the anion. Then add subscripts.

To name a compound containing a polyatomic ion, state the cation name first and then the anion name. If the cation is a metallic element that has more than one common ionic charge, include a Roman Numeral in the cation name.

300

What condition must be met when writing a formula for an ionic compound?

The charges of the anion plus the cation must equal zero. 

300

HNO2

Nitrous Acid 

400

What is a base? 

Generally an ionic compound that produces hydroxide ions when dissolved in water.  
400

How do you determine the formula and name of a binary ionic compound?

To write the formula of a binary ionic compound, first write the symbol for the cation and then the anion. Then add subscripts as needed to balance the charges.

400

Write the formula for a carbon tetrabromide. 

CBr4

400

NH4OH

Ammonia solution
500
What is the Law of Definite Proportions? 
States that in samples of any chemical compound, the masses of the elements are always in the same proportions.  
500

What guidelines are used to write the name and formula of a binary molecular compound? 

To name a binary molecular compound, use the following guidelines: 1. Write the names of the elements in the order listed in the formula.

To write the formula of s binary molecular compound, first use the prefixes in the name to tell you the subscript of each element in the formula. Then, write the correct symbols for the two elements with the appropriate subscripts.

500

What element generally appears in the formula of an acid?  

What element generally appears in the formula of a base?


Hydrogen - acid


Hydrogen ion - base

500

Fe(OH)3

Iron(III) oxide-hydroxide