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Bonds Between Atoms
What are we going to learn about???
See if you can define the following words before starting the lesson…
• Anion- negative ion
• Cation-positive ion
• Octet Rule- rule that states that atoms tend to gain, lose,
or share electrons so that each atom has full outermost
energy level which is typically 8 electrons.
• Polyatomic Ion- charged group of covalently bound
• Monatomic Ion- ion formed from a single atom
• Molecule-neutral group of atoms united by covalent
• Alloy- homogeneous mixture of metals
• Unshared Pair- pair of electrons that is not involved in
bonding but instead is held exclusively by one atom.
of a bond
of a bond
relates to a
•What is an Ionic Bond?
- An Ionic Bond is a chemical bond
resulting from the TRANSFER of electrons
from one bonding atom to another
• When is an ionic bond formed?
- An ionic bond is formed when a cation
(positive ion) transfers electrons to an
anion (negative ion).
What are some characteristics of an ionic
Crystalline at room
Have higher melting
points and boiling points
compared to covalent
current in molten or
solution state but not in
the solid state
•What is an Covalent Bond?
- A covalent bond is a chemical bond
resulting from SHARING of electrons
between 2 bonding atoms.
• What forms a covalent bond?
- A covalent bond is formed between two
What are some characteristics of a covalent
Covalent bonds have
definite and predicable
Low melting and boiling
Covalent Bonds can have multiple bonds, so you should be
familiar with the following…
Single Covalent Bondchemical bond resulting
from sharing of an electron
pair between two atoms.
Double Covalent Bondchemical bond resulting
from sharing of two electron
pairs between two atoms.
Triple Covalent Bondchemical bond resulting
from sharing of three
electron pairs between two
There are five different categories associated with covalent
bonds. What are the 5 different categories?
First, we are going to look at Polar Covalent…
What is polar covalent?
-Polar covalent is a description of a
bond that has an uneven distribution
of charge due to an unequal sharing of
The boy is not equally
sharing with anyone
else but rather taking
all the food for himself.
Next, we are going to look at Non-Polar Covalent…
What is non-polar covalent?
-Non polar covalent is a covalent
bond that has an even distribution of
charge due to an equal sharing of
This couple is
because they are
sharing the drink
Next, we are going to look at Molecular Substances…
What is a molecular substance?
-A molecular substance is a substance
that has atoms held together by
Name 2 Characteristics of a
2. Low melting and boiling
Next, we are going to look at Coordinate Covalent…
What is a Coordinate Covalent Bond?
-A coordinate covalent bond is a
bond formed when one atom donates
both electrons that are shared.
People donate their
blood to help others
just like atoms
“donate” electrons to
form stable octets.
*Think about the party analogy!
Now, we are going to look at Network Solids…
What is a Network Solid?
-A network solid is a solid that has
covalently bonded atoms linked in
one big network or one big
Name 3 Characteristics of a
1. Poor conductors of heat
2. Hard / Strong
3. High melting and boiling
assembles into a unique, twodimensional hydrogen
bonding network in the solid
state, while exhibiting a
twisted molecular structure.
What is a Metallic Bond?
- A metallic bond occurs in
metals. A metal consists of
positive ions surrounded by a
“sea” of mobile electrons.
Name 4 Characteristics of a
1. Good conductors of heat
2. Great strength
3. Malleable and Ductile
Polyatomic ions usually have a
charge because the collection of
atoms has either gained an extra
electron or else it has lost an
What is a Polyatomic Bond?
- A polyatomic bond is
charged group of covalently
bonded atoms. It is made up
of more than one atom.
Just as a summary to what each
bond looks like…
Now that you have completed the review provided you may wish to
practice for your test by answering the following regents questions.
The question is presented in the same way that
http://regentsprep.org/ does them. If you would like to get reasons to
why your answers were incorrect you can find the explanations
there. After you have gotten your answer, click the mouse and the
right answer will show up.