Chapter 2: Molecules, Ions, and Compounds - Description
MACROSCOPIC SCALE Elements combine to make compounds ATOMIC SCALE Atoms combine to make molecules or extended structures What well cover Compound Formulas Ions Monatomic Polyatomic Ionic Compounds ID: 626352 Download Presentation
MACROSCOPIC SCALE. Elements combine to make compounds.. ATOMIC SCALE. Atoms combine to make molecules, or extended structures.. What we’ll cover…. Compound Formulas. Ions. Monatomic. Polyatomic. Ionic Compounds.
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Presentation on theme: "Chapter 2: Molecules, Ions, and Compounds"— Presentation transcript:
Slide1
Chapter 2: Molecules, Ions, and Compounds
MACROSCOPIC SCALE
Elements combine to make compounds.
ATOMIC SCALE
Atoms combine to make molecules, or extended structures.Slide2
What we’ll cover…
Compound Formulas
Ions
Monatomic
Polyatomic
Ionic Compounds
Molecular Compounds
Other types of extended StructuresSlide3
Compound Formulas
Examples:
NaCl
CH
3
OH
(NH
4
)
2
SO
4Slide4
How many O atoms are in Mg
3
(PO
4
)
2
?
2
4
6
8Slide5
How many total atoms are in Mg
3
(PO
4
)
2
?
3
10
11
13Slide6
Three Types of Compounds
Molecular Covalent Extended Covalent
Ionic
AlloysSlide7
Can you predict this?
Ionic Compounds form from: Molecular Compounds form from:Slide8
Types of FormulasSlide9
IONS
Cations
Formed by losing electrons.
Have a positive charge.
Formed mainly from metals.Slide10
IONS
Cations
Formed by losing electrons.
Have a positive charge.
Formed mainly from metals.
Anions
Formed by gaining electrons.
Have a negative charge.
Formed mainly from nonmetals.Slide11
Monatomic Ions- Formed from single atomsSlide12
Books closed: What is the charge on a Mg ion?
+1
+2
+3
-1
-2
-3Slide13
Naming IONS
Cations
Name of element + “ion”
Na
+
= sodium ion
Mg
2+
= magnesium ionSlide14
Types of FormulasSlide15
IONS
Cations
Formed by losing electrons.
Have a positive charge.
Formed mainly from metals.Slide16
IONS
Cations
Formed by losing electrons.
Have a positive charge.
Formed mainly from metals.
Anions
Formed by gaining electrons.
Have a negative charge.
Formed mainly from nonmetals.Slide17
Monatomic Ions- Formed from single atomsSlide18
Books closed: What is the charge on a Mg ion?
+1
+2
+3
-1
-2
-3Slide19
Naming IONS
Cations
Name of element + “ion”
Na
+
= sodium ion
Mg
2+
= magnesium ionSlide20
Naming IONS
Cations
Name of element + “ion”
Na
+
= sodium ion
Mg
2+
= magnesium ion
Anions
Name of element with –ide ending + “ion”
Cl
-
= chloride ion
O
2-
= oxide ionSlide21
Polyatomic Ions you need to knowSlide22
Ionic Compound Formulas
Total cation charge = Total anion charge
Ex: Na
+
and Cl
-
make ________
Slide23
Ionic Compound Formulas
Total cation charge = Total anion charge
Ex: Na
+
and Cl
-
make NaCl
Mg
2+
and Cl
-
make ________ Slide24
Ionic Compound Formulas
Total cation charge = Total anion charge
Ex: Na
+
and Cl
-
make NaCl
Mg
2+
and Cl
-
make MgCl
2
NH
4+ and SO42- make _________Slide25
What is the formula of the compound formed between Fe
3+
and Cl
-
?
FeCl
FeCl
3
Fe
3
ClSlide26
What is the formula of the compound formed between Fe
3+
and SO
4
2-
?
FeSO4
Fe(SO
4
)
2
Fe
2
(SO
4
)3
Fe3(SO4)2Slide27
Naming Ionic Compounds
Name = cation name + anion name
Ex:
NaCl =
NH
4
Br =Slide28
Molecular Compounds
Nonmetal + nonmetal gives molecular compound
Ex: C + O
S + O
C + H
Slide29
Aside on gas prices…
Crude oil
Propane
Butane
Jet Fuel
Gasoline
Diesel/Heating
Longer molecules(asphalt/tar)
Slide30
Predicting Molecular Compound FormulasSlide31
Naming Molecular Compounds
Binary Compounds
form between 2 elementsSlide32
Naming Molecular Compounds
Binary Compounds
form with 2 elements
Element with highest group # named last, like it’s an anion.Slide33
Naming Molecular Compounds
Binary Compounds
form with 2 elements
Element with highest group # named last, like it’s an anion.
