71
Molecules, Compounds, Elements, and
bonds
10/19/15
EQ: How do properties of elements
and compounds relate to
Bonding?
Molecules, Compounds, Elements, and
72
bonds
10/19/15
Application
Notes: Glue here when done
Starter:
Connection:
Ws: Elements and Compounds turn
in when done
Which of these has the greatest
mass and why?
Name some compounds that you
know you use in your life
Practice:
1. Compound:
Exit :
2.
Write two things that you learned
today from the lesson .
Element:
October 192, 2015
AGENDA
8.5 D, 6.5C
I will be able to
recognize the difference
between an element and a
compound and how they
are used in chemical
formulas by writing,
speaking, and reading
during notes and an
activity.
1 Starter
2. Notes
3. Activity
4. Exit
Starter
Which of these has the greatest mass
and why?
3 because It has 5 protons and 6
neutrons which equals the mass of the
atom
Table of Contents
Date
Lecture/ Activity/ Lab
Page
10/2
Metals, Nonmetals, and Metalliods
10/5
Comparing Elements Lab
10/6 Periodic table Graphic Organizer
10/7
Coloring the periodic table
10/8
Periodic Puzzles
10/12
Bohr Model Challenge
10-13-14
Wheres Al
10/15
Density
10/16
Density Lab
10/19 Molecules, Compounds, and Elements
53-54
55-56
57-58
59-60
61-62
63-64
65-66
67-68
69-70
71-72
Application:
Atoms, Elements,
Molecules,
https://www.youtube.com/watch?v=VOQzWLeZoEc
Atoms-REMEMBER
• An atom is the smallest
particle of an element
that still has the
properties of that
element.
All matter is made of
atoms, even you.
Atoms
• Atoms are structures too
small for us to see, even
with aid of a microscope.
• Because we can’t see
atoms, we use models to
help us study and
understand them
Atom model
N
N
N
N
• We often use circles to
represent atoms and put
them together to
represent molecules.
• Some use a bar or a line
to represent the bonds
between the atoms and
some don’t.
Elements
• An element is a
substance made of
only one kind of
atom.
• Elements can be
arranged to form
new substances.
O
N
O
N
O
O
Molecule
• A molecule is formed
when 2 or more atoms
bond together.
• If a molecule is made
up of only 1 kind of
atom we call it an
element.
• If the molecule is made
up of 2 or more kinds of
atoms we call it a
compound.
Element
Compound
Molecules
• Atoms of elements often bond together to
form molecules.
• Atoms of oxygen bond together to form
oxygen molecules or O2.
O
O
O
O
O
O
Element Molecules
• Hydrogen molecules are formed when 2
hydrogen atoms bond together.
H
H
H
Sulfur molecules are formed when 8 sulfur atoms bond
together.
S
S
S
This molecule is
made
of
S
S
S
only 1 kind of atom so it is
S
S
considered
an element.
Compounds
• A compound is two or more elements joined
together by a chemical bond.
• Water is an example of a compound.
• Each molecules is made up of 1 oxygen atom
and 2 hydrogen atoms.
Sugar Compound
• The simple sugar glucose is a compound
made up of 6 carbon atoms, 12 hydrogen
atoms, and 6 oxygen atoms.
C
O
C
O
O
C
O
C
O
O
C
C
Glucose
• Glucose is a product of photosynthesis. Atoms
are rearranged to produce oxygen and
glucose.
O
+
+
+
O
OO
OO
O
O
OO
OO
Compound Properties
• The properties of a compound are often very
different from the elements they are made up
of.
• For example, at room temperature hydrogen
and oxygen are both gases but water is a liquid.
2 Hydrogen +
+
Oxygen
“yields” Water (hydrogen oxide)
Covalent Bond
formed when two atoms share one
or more electron pairs; usually
non-metals
Draw picture
Draw picture
A water molecule is an
example of the single
covalent bond
between oxygen and
hydrogen.
An IONIC BOND is an electrostatic
interaction that holds together a
positively charged ion (cation-losing and
electron) and a negatively charged ion
(anion-gaining an electron).
Draw picture
• the result of the attraction of oppositely
charged ions (between metal and nonmetal-transfer of electrons)
Draw picture
Molecules: Elements vs. Compounds
• Look at the molecule .
• Decide what elements make-up it up.
• Distinguish between Element and compound.
Formula of
Molecule
H2O
# of atoms in molecule and
elements
2- hydrogen and oxygen
Classification:
Element or
Compound
compound
Type of
Bond:
Ionic or
Covalent
Covalent
AlPO4
1-Aluminum , 1-Phosporus 4-Oxygen
Compound
Ionic
FI2
1-Fluorine , 2-Iodine
Compound
Covalent
O3
3-Oxygen
Element
Covalent
71
Molecules, Compounds, Elements, and
bonds
10/19/15
EQ: How do properties of elements
and compounds relate to
Bonding?
Molecules, Compounds, Elements, and
72
bonds
10/19/15
Application
Notes: Glue here when done
Starter:
Connection:
Ws: Elements and Compounds turn
in when done
Which of these has the greatest
mass and why?
Name some compounds that you
know you use in your life
Practice:
1. Compound:
Exit :
2.
Write two things that you learned
today from the lesson .
Element: