1. Tuesday, March 24 Pick up a notes slip and glue it into your comp book
Take out your packet and open to pages Review the information on these pages to preview what you are learning today.

2. Brainpop Video Clip: Chemical Bonding
While watching, think about bonding and the two main types (ionic and covalent).
After the Video, Round Robin share with your team one thing you learned from the video until you run out of things to share.

3. Ionic and Covalent Bonding Notes

4. Stable or Unstable?
An atom is only stable if it has a full valence shell
If an atom is stable, it will not bond
If an atom is not full, it will bond

6. Compounds
Compounds are formed when 2 atoms of different elements bond together.
Atoms bond to fill their valence shell
An atom will bond with an many atoms as it takes to fill its outer shell
Once the valence shell is full, that atom is stable

7. Types of Chemical Bonds
There are two types of chemical bonds:
Ionic Bonds
Covalent Bonds

8. Ionic Bonds Ionic bonds exist between a non- metal and a metal
When two atoms bond ionically, they gain/lose electrons
When an atom gains or loses an electron, it becomes an ion (an atom with a positive or negative electrical charge)

9. Ions Ca +2 +2 +2 +2 +2 +2 +2 It has 2 valence electrons.
How many does it need to be stable?
Which other elements would lose 2 electrons?
8…so it can either lose 2 or gain 6. Which is easier?
Calcium is in group 2.
How many valence electrons does it have?
Group 1 18 2 13 14 15 16 17 3 4 5 6 7 8 9 10 11 12
Losing 2…if it loses 2 electrons, it becomes positive Ca +2 +2 +2 +2 +2 +2 +2

10. Ions +1 +1 +2 +3 +4 -3 -2 -1 +1 -2 +2 +3 +4 -3 -1 +1 -2 +2 +3 +4 -3 -1
Group 1 18 2 13 14 15 16 17 3 4 5 6 7 8 9 10 11 12 +1 +1 +2 +3 +4 -3 -2 -1 +1 -2 +2 +3 +4 -3 -1 +1 -2 +2 +3 +4 -3 -1 +1 +2 +3 +4 -3 -2 -1 +1 +2 +4 -3 -2 -1 +3 +1 +2

11. Types of Ions
Cation
Positive
Metals loses/gives away valence electrons)
Anion
Negative
Nonmetals gain/take valence electrons)

15. Cation Positive ion (a metal gives away electrons in ionic bonding and becomes positively charged)
Anion Negative ion
(a nonmetal takes electrons in ionic bonding and becomes negatively charged)

17. Covalent Bonds Covalent bonds exist between NONMETAL and NONMETAL.
Example: H2, H2O, NO3, CH4
Covalent bonds SHARE electrons.
Shared electrons don’t belong to either atom.

18. Covalent Bond (2 non-metals)

19. Lewis Dot Diagram Review
Draw the valence electrons up to 8! Then show the bonding. Write the charges/ions for ionic bonds.

22. CH4

23. Writing Chemical Formulas – Ionic Bond
The cation (metal) is always written first in the formula, like Sodium in Sodium Chloride (NaCl)
Write the ion charges
Cross them down and write them as a subscript

24. Formulas of Ionic Compounds
In order for ionic compounds to be electronically neutral, the sum of the charges on the cation and anion in each formula must be zero.
Aluminum oxide:
Al3+
O2–
Al2O3
Sum of charges: 2(+3) + 3(–2) = 0

25. To Do: Complete the “Bonding Basics” practice in your packet.
Draw the bonds, as specified
Write the chemical formula for each compound
Extra Challenge: Follow the instructions in your packet to try and write the correct names for each compound.
If finished early, start reading about Acids and Bases on the next page in your packet and READ pages in your textbook. Then start answering the Acid and Base questions in your packet.