Determine the Ionic Charge of the following 1

Determine the Ionic Charge of the following 1. Sr 2. Te 3. N 4. Mg 5. Se

Compounds • Compounds are a combination of at least two elements that act as one unit • Compounds have separate identities different from their component elements

Compounds • When a compound forms it causes a chemical bond to occur. • A chemical bond -is the force that holds two atoms together • This is the result when electrons are gained, lost, or shared between atoms

Ionic Bonds • Ionic bonds form between METALS & NONMETALS only • Example: Na. Cl, Mg. Cl 2 • Ionic bonds form ionic compounds which stay together due to the electrostatic attraction between the cat-ion and an-ion • Ionic compounds are usually crystalline solids at room temperature

Chemical Formulas • Chemical Formulas show the kinds and number of each atom present • The small numbers written below a symbol are called SUBSCRIPTS • Subscripts show the number of each atom present • Metals are written first in the formula

Determine the kinds and number of each atom in the following: • 1. • 2. • 3. • 4. • 5. • 6. CO 2 Al(NO 3)3 CCl 4 Mg. SO 4 Mn(NO 3)7 HCl

Charges for Groups 3 -12 • Groups 3 -12 are known collectively as the transition metals • These metals can take various charges • For example: • Cr can take a +2, +3, or +6 charge • Fe can take a +2 or +3 charge

Charges for Groups 3 -12 • Exceptions: • (Three that you need to memorize) • Silver is always +1 • Zinc is always +2 • Cadmium is always +2

Binary Ionic Compounds • A binary ionic compound is an ionic compound that contains only 2 elements • Examples: • Na. Cl Mg. F 2 • Binary ionic compounds use the ionic charges in order to write correct formulas

Writing Correct Chemical Formulas for Binary Ionics: • 1. Determine the charge of each ion • 2. Crisscross the value associated with the charge to the bottom right of the other atom • 3. Reduce the subscripts to the lowest possible terms

Example: Write the formula for: • Magnesium and Chlorine 2+ Mg -1 Cl Mg. Cl 2

Write Formulas for the following: • 1. Mg, P • 2. Al, S • 3. Ag, Cl • 4. K, I • 5. Zn, P • 6. Na, O • 7. Al, F

Practice Writing Compounds Write the symbols for the following names Ca, Cl • 2. Cd, O • 3. Na, F • 4. Ag, N • 5. Zn, S • 6. Ra, Br • 1.

Practice Writing Compounds • Mg, N • Al, S • Na, N • Cd, F • Ag, P • Sr, Br • Ga, At

• When Sodium and Sulfur react, what compound is produced? • When Calcium and Bromine react, what compound is produced?

Naming Ions • Cations take the metal’s name and add cation • Example: Na+ = sodium cation • Name the following: • K+ • Al 3+

Naming Ions • Anions always add “-ide” as a suffix in place of the original ending • Cl- = Chloride anion (Not Chlorine) • O 2 - = Oxide anion (Not Oxygen) • Name the following: • S 2 • N 3 -

Naming Binary Ionic Compounds • In naming binary ionic compounds, put the cation’s name with the anion’s name • Example: Mg. F 2 • Mg+2 = Magnesium cation • F- = Fluoride anion • Magnesium Fluoride • Example: Na 2 S • Na+= Sodium cation • S-2= Sulfide anion • Sodium Sulfide

Binary Ionic Compounds Containing Transition Metals • In naming compounds with transition metals, include the roman numeral with the transition metal • To figure out the transition metal’s charge, look at the anion’s charge

Binary Ionic Compounds Containing Transition Metals • Example: Fe. Cl 3 • Cl has a -1 charge • There are 3 Cl in the formula • There is only one Fe in the formula • So Fe must have a +3 charge to balance out the Cl charge • Iron (III) Chloride

Naming Transition Metals • The transition metals can take various charges in ionic compounds • In order to name them, the charges must be given • The transition metals are located in groups 3 -12 (the center of the periodic table)

Naming Transition Metals Using The Roman Numeral System • Cu 2+ is called Copper (II) + • Cu is called Copper (I) • Name the following ions: • Fe 2+ , Fe 3+ , Sn 2+ , Sn 4+

Practice Name the following compounds: • 1. Mg. Cl 2 • 2. Li 2 O • 3. Ba. S • 4. Sr 3 P 2 • 5. Rb. Cl • 6. Mg. F 2 • 7. KCl • 8. Cs 2 S • 9. KBr

• Name or write the following compounds • Chromium (VI) Oxide • Ca 3 P 2 • Strontium Sulfide • Cu 2 O

Name or write the correct formula for the following compounds • 1. Zinc Chloride • 2. Fe 3 P 2 • 3. Sodium Selenide • 4. Cr. N 3 • 5. Gold (II) Iodide

Name the following compounds • 1. Cu. O • 2. Co 3 N 2 • 3. Fe 2 O 3 • 4. Cr. I 6

Write the formula for the following names • Write formulas for: • 1. barium oxide • 2. cobalt (II) fluoride • 3. silver phosphide • 4. zinc chloride • 5. Titanium (IV) oxide

Naming Ternary Compounds • Ternary compounds are named similar to binary ionic compounds: • Still going to be using the cation’s name but this time you are going to be using the polyatomic name as the anion’s name

Ternary Compounds • Ternary Compounds contain at least 3 different elements • A ternary compound contains a polyatomic ion • Always write the polyatomic ion in parenthesis before crossing the charges