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Chemical Bonding: PART 2 – COVALENT. You know you LOVE notes because they help you learn! . s. Chemical. Bond. 8. Chemical bonding is the way atoms are attracted to each other to form compounds. Bonding Basics. - PowerPoint PPT Presentation
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Chemical Bonding: PART 2 – COVALENT
You know you LOVE notes because they
help you learn!
Chemical bonding is the way atoms are attracted to each other to form compounds.
s
8
Bonding Basics• All atoms want to have a
FULL outer energy level – just like the Noble Gases – because this means stability!
• Atoms want 8 valence electrons (except H & He who want 2 because 2 electrons mean FULL)
Cl
ClCl
Cl Cl
Cl Cl
Cl Cl
Cl Cloctet
Cl Cloctet
Cl Cloctet octet
SHARED ELECTRONS
Covalent Bonds
Cl Cloctet octet
1.Covalent Bonds are formed when atoms SHARE one or more electrons to complete their outer shell
Covalent Bonds
Cl Cloctet octet
2. Non-metal + Non-metal (gay marriage)
3. “Co” = sharing”valent” = valence electrons
Molecules• Fundamental unit
of covalent compounds
• Any group of atoms held together by covalent bonds
Single Bonds
Cl Cl
1. One bonding PAIR
Cl Cl
Single Bonds1. One bonding PAIR2. Abbreviated with a
dash
Cl Cl
Single Bonds1. One bonding PAIR2. Abbreviated with a
dash3. This is a chlorine molecule Cl2
Cl Cl
****Remember***The straight line represent
TWO electrons, one from each atom
Double Bonds
O2Ex. Molecular Oxygen
How will two oxygen atoms
bond?
OODouble Bonds
OOEach atom has two unpaired electrons
Double Bonds
OODouble Bonds
OODouble Bonds
OO• Both atoms of Oxygen want to gain two electrons
Double Bonds
OODouble Bonds
OODouble Bonds
OODouble Bonds
OODouble Bonds
OO• Both electron pairs
are shared
Double Bonds
6 valence electronsplus 2 shared electrons
= full octet
OODouble Bonds
OODouble Bonds
6 valence electronsplus 2 shared electrons
= full octet
• two bonding pairs,
OOmaking a double bond
Double Bonds
OO=• For convenience, the
double bond can be shown as two
dashes.
OODouble Bonds
Double Bonds1. Two bonding PAIRS
O O
O O
Double Bonds1. Two bonding PAIRS2. Abbreviated with 2
dashes
O O
Double Bonds1. Two bonding PAIRS2. Abbreviated with 2
dashes3. This is a Oxygen molecule O2
O O
OO=This is the oxygen
molecule,O2
this is so
cool!!
Double Bonds
GROUP PRACTIC
E!
1. F and F?
What type of bond?
2. F and H?
3. Na and F?
A = covalent bond
A = covalent bond
A = ionic bond
4. O and H?
What type of bond?
5. Mg and I?
6. C and C?
A = covalent bond
A = ionic bond
A = covalent bond
1. H + H H2
Practice Building Covalent Bonds
H HH H+H H- SINGLE
COVALENT
BOND
2. How does Carbon bond with Hydrogen?
Practice Building Covalent Bonds
C HH
HH
2. How does Carbon bond with Hydrogen?
Practice Building Covalent Bonds
C HH
HH
4 single
covalent bonds
C + H CH4
2. How does Nitrogen bond with Nitrogen?
Practice Building Covalent Bonds
TRIPLE COVALEN
T BOND
N N---N N+ N N
2. How does Nitrogen bond with Nitrogen?
Practice Building Covalent Bonds
N + N N2
Enjoy your Day!
And Remember
: