Download 1.5.16(Chem) - mrcarlsonschemistryclass

1) BellRinger: Remind
– Read article and
then do a Sentence 
Phrase  Word
2) Worksheet #26
3)QUIZ #9
Draw Picture of a sodium and chlorine
atom:
Now, draw a picture of a sodium and
chloride ion:
Cations and Anions
• Cations are ions with a POSITIVE charge.
• Anions are ions with a NEGATIVE charge.
• Draw the funny way to remember cations and
anions:
•
Compounds
• Atoms bonded together with an IONIC bond
are called ionic compounds.
• An ionic bond is a METAL bonded with a
NONMETAL.
• Draw the crystal lattice structure for sodium
chloride:
•
Empirical Formula
• Refers to the ratio of ions in a
compound
• NaCl has a ratio of 1:1 (1 to 1).
• MgCl2 has a ratio of 1:2 (1 to 2).
• AlCl3 has a ratio of 1:3 (1 to 3).
Lewis Dot Structures
Dots used to represent VALENCE electrons
around an atom.
Lewis Dot Structures
• Sodium
2) Chlorine
3) Magnesium
4) Oxygen
5) Nitrogen
Carbon
Oxidation Number
• Charge that an atom will have if
made into an ion.
• Na becomes Na+, so its oxidation
1+
number is
.
• Cl becomes Cl-, so its oxidation
number is
1- .
Magnesium has 2 valence electrons
Magnesium has a 2+ charge
Flourine has 7 valence electrons
Flourine has a 1- charge
Mg (2+)
MgF2
F (-1)
F(-1)
Ionic Combinations
• Sodium oxide (Sodium and oxygen)
Na (+1) Na(+1)
Na2O
O(2-)
MgO
Mg (2+)
Cancel out perfectly
O (2-)
Criss -Cross Method
• Lithium oxide
REACTION OF SODIUM AND CHLORINE
• Video
IONISATION
• Video
QUIZ #9
1)Draw the Lewis dot structure
for Aluminum
2) Give the chemical formula for
lithium and fluorine coming
together.