1. 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)

2. Ionic Bonds Containing
Transition Metals

3. Friday Funnies!!!

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

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

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

7. 7 Valence electrons
7 Valence electrons Both want 1 more

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

10. H2
Nonpolar Bond: Electrons are shared equally

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

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

13. 2 or more atoms bonded together
Molecule:
2 or more atoms bonded together
Example: H2O H2

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

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

16. 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.

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

19. Polar or Nonpolar?????

22. 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

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

24. Write the name of
this molecule: CO
Carbon Monoxide

25. Write the formula for Oxygen diflouride
OF2

26. Write the formula for
carbon dioxide
CO2

27. Write the formula for Boron tribromide
BBr3

28. Write the name for N2O5
Dinitrogen Pentoxide

29. Write the formula for
rubidium sulfide
Rb2S

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

31. Write the formula for
aluminum selenide
Al2Se3

32. Roman Numerals
Greek Prefixes