 Please update your table of contents.
Page #
96-97
Title
Ionic Bonding
 Please take the sheet from the front cart and place it on pg. 97

Divide pg. 96 horizontally about ¾ down the page.

 What happens when an atom loses an electron?
What is its new charge?
 What happens when an atom gains an electron?
What is its new charge?

What happens once these ions have formed?
 What holds an ionic bond together?

Ionic bonds form as a result of the attraction between positive and negative ions!

Let’s check out two videos on ionic bonding…
 NOVA: How Elements Form Compounds
 What are ionic bonds?
How do you know the formula for an ionic compound?

1.
2.
3.
4.
Find the charge of the ions and remove the + and – signs.
If the numbers are the same, they cancel each other out.
If the numbers are different, “drop” them and
“swap” them.
If a number is dropped to a polyatomic ion, then brackets need to be inserted.

Mg +2 + O -2
Mg
2
+ O
2
Mg +2 + Cl -1
Mg
2
+ Cl
1

Mg +2 + OH -1
Mg
2
+ OH
1
Mg(OH)
2
Magnesium hydroxide
Milk of magnesia
(NH
4
) +1 + S +2
(NH
4
)
1
+ S
2
(NH
4
)
2
S
Ammonium sulfide
Main ingredient of stink bombs

 Find a classmate who is representing an ion with the opposite charge as your ion.
 Work together to follow the steps of the drop and swap, and write the formula for the compound on your worksheet.
 Once you have bonded with as many classmates as you are able, start on the Ionic Bonding Worksheet.