QQ: Write & name the formula of the ionic compound created when a chromium (II) cation bonds with Bromine. Write the formula for gold(I) sulfide. In the.

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Presentation transcript:

QQ: Write & name the formula of the ionic compound created when a chromium (II) cation bonds with Bromine. Write the formula for gold(I) sulfide. In the ionic compound Co3N2, which cation is present? Co (II) or Co (III)

Ionic Bonds Containing Transition Metals

Friday Funnies!!!

Today’s Object: I understand how covalent bonding is different from ionic bonding.

Binary Molecule consist of exactly two nonmetals Examples include HF, NO2, and P2O5

Back to the idea of “chemical soup” Hyperlink to difference between ionic and covalent animation

7 Valence electrons 7 Valence electrons Both want 1 more

Instead of transferring electrons, some atoms Covalent Bonds Instead of transferring electrons, some atoms share electrons.

H2 Nonpolar Bond: Electrons are shared equally

Covalent Bonds Models HCl Hydrogen Chloride CH4 Methane H2 Hydrogen molecule C2H6 Ethane

*Nonmetals to nonmetals H2, Cl2, F2 And Hydrogen often: H2O

2 or more atoms bonded together Molecule: 2 or more atoms bonded together Example: H2O H2

Elements found naturally bonded with themselves Diatomic Molecules Elements found naturally bonded with themselves

Have No Fear Of Ice Cold Bears! H N F O I Cl Br Hydrogen Nitrogen Fluorine Oxygen Iodine Chlorine Bromine

Polar Bonds: Caused by the unequal sharing of the electrons of a covalent bond Remember…Polar Bonds are always covalent because they are sharing …not taking.

The atom with the greatest attraction for the electrons has a partial negative charge.

Polar or Nonpolar?????

Naming Covalent Compounds 1. First: start with lower group # (In same group, start with lower one) 2. First element is just its name. 3. The second one: add -ide Use Greek prefixes to indicate how many of each atom. Don’t put “mono” on the first atom

Number Prefix 1 Mono 2 Di 3 Tri 4 Tetra 5 Penta

Write the name of this molecule: CO Carbon Monoxide

Write the formula for Oxygen diflouride OF2

Write the formula for carbon dioxide CO2

Write the formula for Boron tribromide BBr3

Write the name for N2O5 Dinitrogen Pentoxide

Write the formula for rubidium sulfide Rb2S

Phosphorous pentachloride Write the name of this molecule: PCl5 Phosphorous pentachloride

Write the formula for aluminum selenide Al2Se3

Roman Numerals Greek Prefixes