Chemistry Ionic and Molecular Compounds
What is an ionic compound?
- A compound made up of a cation/mental and an anion/non-metal - Electrons are transferred in ionic compounds
What is a molecular compound?
- A compound made up of non-metals - Electrons are shared in molecular compounds
What is a poly atomic ion? Give an example.
- An ion made up of more than one atom Ex. SO4^-2 and OJ ^-1
How many valence electrons in Li?
1
How many valence electrons in Al?
3
How many valence electrons in N?
5
When do you use Roman numerals in the name of an ionic compound?
All transitional metals and Sn and Pb need a Roman numeral in their name to indicate charge of the cation
Write the formulas for the following chemical compounds: Diboron Tetrabromide
B2Br4
What is the formula for Ba^+2 and S^-2?
BaS
Decide whether the following compounds are Ionic or Molecular: Carbon Tetrafluoride
CF4 = Molecular
Write the formula for the following compounds: Calcium Phosphate
Ca3(Po4)2
Name the following chemical compounds: Ca(C2H3O2)2
Calcium Acetate
How do you name an ionic compound?
Cation - same name as on periodic table Anion - add -ide to the ending unless it is a poly atomic ion then just look at cheat sheet
If Cl gains 1 electron, what kind of charge does it have?
Cl^-1
Write names for the following ionic compound: CuBr2
Copper (II) Bromide
Write the formula for the following compounds: Chromium (III) Nitrite
Cr(NO2)3
Name the following molecular formula: N2O
Dinitrogen Monoxide
Name the following chemical compounds: P2O5
Diphosphorus Pentoxide
What is different about a Covalent/Molecular Bond?
Electrons are shared
What is different about an Ionic Bond?
Electrons are transferred
If Fe loses 2 electrons, what kind of charge does it have?
Fe^+2
Which group(s) of elements don't form ions?
Group 4A and 8A
Write the formula for the following compounds: Mercury (II) Bromide
HgBr2
Name the following compounds: Fe(ClO3)3
Iron (III) Chlorate
Name the following chemical compounds:FePO4
Iron (III) Phosphate
Write the formulas for the following chemical compounds: Potassium Carbonate
K2CO3
Write the formula for Potassium Sulfide?
K2S
What is the formula for Li and O?
Li2O
Decide whether the following compounds are Ionic or Molecular: Lithium Iodine
LiI = Ionic
Name the following compounds: LiCN
Lithium Cyanide
Write the formulas for the following chemical compounds: Magnesium Chloride
MgCl2
Write the formulas for the following chemical compounds: Maganese (II) Phosphate
Mn3(PO4)2
Name the formula for the following compounds: Nitrogen Triflouride
NF3
Write the formula for Sodium Iodide?
NaI
Name the following molecular formula: PCl3
Phosphorus Trichloride
What condition must be met in writing a balanced formula for an ionic compound?
Positive charge must cancel out negative charge
Write names for the following ionic compound: KCl
Potassium Chloride
Name the formula for the following compounds: Disulfur Dichloride
S2Cl2
Decide whether the following compounds are Ionic or Molecular: NaCl
Sodium Chloride = Ionic
Decide whether the following compounds are Ionic or Molecular: SO2
Sulfur Dioxide = molecular
Name the following molecular formula: SF6
Sulfur Hexafluoride
What does the subscript, +1, in Li^+1?
The charge of Li
What does the subscript of NO2 represent?
The number of atoms of O
Name the following chemical compounds: Ti(SO4)2
Titanium (IV) Sulfate
When do you NOT use mono to name a molecular compound?
When the first element only has 1 atom -Ex. Co2 = Carbon Dioxide not monocarbon dioxide
When are parentheses used in writing a chemical formula?
When there is more than one of a poly atomic ion
Write names for the following ionic compound: ZnS
Zinc (II) Sulfide