1. Ions with Lewis Dot structures

2. First things first! .. .. Na. .Cl: Na [ ] :Cl: .. ..
Determine whether the bond will be ionic or covalent!
A nonmetal and a metal is ionic if they are both nonmetals it is covalent, hydrogen is not a metal.
To draw an ionic bond remove the electron(s) from the cation and add them to the anion. Show the charges on each ion. .. .. + -
Na.
.Cl: Na
[ ]
:Cl: .. ..

3. It has an extra electron
For Polyatomic Ions…
The polyatomic ion is a covalently bonded structure with an ionic bond to another substance.
NH4F H . F
H-N-H . H
That goes to Fluoride
It has an extra electron

4. It has an extra electron
For Polyatomic Ions…
The polyatomic ion is a covalently bonded structure with an ionic bond to another substance.
NH4F - + H F
H-N-H H
That goes to Fluoride
It has an extra electron

5. Polyatomic Ions we need to know

6. [ ] Ammonium + H H H-N-H H-N-H . H H What happens
What it looks like when done +
[ ] H H
H-N-H
H-N-H . H H

7. [ ] Hypochlorite - - - O-Cl - - - - O-Cl - - - - . - What happens
What it looks like when done . - -
[ ] -
- -
O-Cl - -
- -
O-Cl -
- -

8. [ ] Hydroxide - O-H - - O-H - - . - What happens
What it looks like when done .
[ ] - - -
O-H - -
O-H -

9. [ ] Nitrite - - - - - - O-N=O - - - O-N=O - - . - What happens
What it looks like when done . - - -
[ ] -
O-N=O -
O-N=O

10. [ ] Acetate - - - - O= - H O= H - - O-C-C-H - - - - - - O-C-C-H - H H
What happens
What it looks like when done - - - - O= - H . O= H
[ ] - -
O-C-C-H
- - -
- - -
O-C-C-H - H H

11. Draw the Lewis Dot Structure for
Ca(ClO)2
Na2S
NH3
NH4OH
Sc(NO2)3
NaCH3COO

12. Homework
Give the Lewis dot structure for
NaClO
Ba(OH)2