Ions with Lewis Dot structures Abbreviating Lewis Dot
Ions with Lewis Dot structures
Abbreviating Lewis Dot Structures It can sometime be tedious writing out all the dots, and they can also be difficult to see. n So it is very common to use a dash to represent a pair of electrons. n So… n . . H : O. . : Cl: . . becomes H-O-Cl
If it’s a double bond single bond is a single dash, double bond is a double dash. n So CO 2 n O=C=O n Make sure bonds connect the elements, and unpaired electrons don’t connect to another element
Lewis dot structures with ions
First things first! Determine whether the bond will be ionic or covalent! n A nonmetal and a metal is ionic if they are both nonmetals it is covalent, hydrogen is not a metal. n To draw an ionic bond remove the electron(s) from the cation and add them to the anion. Show the. . charges on +each. . ion. n Na. . Cl: . . Na [: Cl: . . ]
For Polyatomic Ions… The polyatomic ion is a covalently bonded structure with an ionic bond to another substance. n NH 4 F n H. F H-N-H. H That goes to Fluoride It has an extra electron
For Polyatomic Ions… The polyatomic ion is a covalently bonded structure with an ionic bond to another substance. n NH 4 F n + H F H-N-H H That goes to Fluoride It has an extra electron
Polyatomic Ions we need to know
Ammonium What happens H H-N-H. H What it looks like when done [ H + H-N-H H ]
Hypochlorite What happens . - - ] - [ -O-Cl- - - O-Cl - - What it looks like when done
Hydroxide What happens . [ -O-H - - - O-H - What it looks like when done ] -
Nitrite What happens - O-N=O - [ -O-N=O - - - . - What it looks like when done ] -
Acetate What happens - -O= - [ H O-C-C-H H - - -O= H O-C-C-H H. What it looks like when done - ]
Homework n Redo the Lewis Dot worksheet with dashes
- Slides: 14