Wednesday, November 2
Warm-up: Look at the probe on your table (in
sheet protector). Write down everything on the
list that is NOT made of molecules. Explain your
answers.
Please complete this warm-up on the small paper
that I gave to you. You may discuss with those
who you are sitting with, but everyone needs to
turn in their own paper.
Which of these are NOT made of molecules?
X
X
X
X
Reminders:
-Conference forms due TODAY
-If you didn’t turn in density exit ticket yesterday, make sure that you
put it into the late work basket today
-Quiz is on Friday. Study sheet is due on Friday.
You do NOT need to write in complete sentences.
This is YOUR study sheet – complete it in how
It will help you best!
How can matter be measured,
described and changed?
Today we will…
-Classify matter in terms of elements,
compounds and mixtures
Mission: We will be incredible
science students.
Positive
1 amu
Neutral (no
charge)
1 amu
Negative
.0005 amu
Part of nucleus
Part of nucleus
Flying around nucleus
very rapidly, forms
electron cloud
Volume
•Most of the atom’s
volume is the space
where the electrons
move
Mass
• The significant amount of
the mass of an atom comes
from the protons and
neutrons. Since the mass of
the electrons is so small, it
doesn’t really affect the
overall mass of the atom.
Charge
• The charges of the protons
and electrons cancel each
other out because an atom will
have the same # of electrons
as protons. So the charge of
an atom is neutral.
Valence Electron
• The valence electrons are the ones that
are the farthest from the nucleus. If the
atom doesn’t have a specific number of
these, then it will be reactive and it can
gain or lose valence electrons. If it gains
electrons, it becomes a negatively
charged ion. If it loses electrons, then it
becomes a positvely charged ion.
Molecule
• When two or more atoms
bond together, or combine,
they make a particle called a
molecule (ex: H2O).
Stand up and find one person to talk to who you
don’t currently sit with. Person who’s birthday comes next is
Person A. Other partner is B.
Partner A: Tell partner B what protons and neutrons have in common and
how they are different.
Partner B: Tell partner A where the mass of an atom comes from and why.
Partner A: Tell partner B where the volume of an atoms comes from.
Partner B: Tell partner A what the overall charge of an atom is and why it
has that charge.
Partner A: Tell partner B what the point of the activity was yesterday when I
asked you to make words with the bag of letters. How is that an analogy for
atoms and molecules?
Partner B: Tell partner A one example of a molecule.
Say thank you to your friend. Tell them how incredible they are and then sit down. ☺
Add to your table of contents
Date
11/2
11/2
Title
Pure vs Mixtures
Mixtures
Page #
39
40
Pages 16, 18, 21-24 in Matter and Energy
Skip the box about heterogeneous and homogeneous mixtures
element
periodic
Hydrogen, oxygen, carbon, gold
atom
atoms
molecule
molecule
Water (H2O), Carbon dioxide (CO2), Oxygen (O2), glucose (C6H12O6)
pure
pure
single
compound
Pure – single atom – gold, carbon, oxygen, hydrogen
Compounds – water, salt, carbon dioxide
mixture
Saltwater, air (has many different gases), sand, sand and water, steel (iron and carbon)
Mixtures do not have to be liquid
A mixture in which there are
different properties in
different parts of the
mixture (things aren’t even
distributed)
Oil and water, sand, sand
and water
A mixture in which
substances are evenly
distributed throughout the
mixture (you cannot tell one
part of the mixture from
another)
Salt water, sugar water, the air
in this room, steel (iron and
carbon)
Compounds are new substances
formed by atoms that bond
together
The substances in mixtures
remain the same substances
Can be separated only be
breaking bonds between atoms
Can be separated by physical
means
The proportions of different
substances in a compound are fixed
because the type and number of
atoms of the basic unit of the
compound are always the same
Salt, water, glucose
The proportions of different
substances in a mixture can vary
throughout the mixture or from
mixture to mixture
Salt water, air (with nitrogen,
oxygen, carbon dioxide, etc)