This document provides instructions for students regarding an assignment on elements, compounds, and mixtures. It includes a list of materials needed, project grades, discussion leading responsibilities, and content on the topics. Key points: - Students are to log into an online learning platform, open a slide presentation on elements/compounds/mixtures, and complete pages 1-2 of assigned readings. - The content discusses the defining characteristics of elements, compounds, and mixtures - namely that elements are pure with one type of atom, compounds are pure with two or more types of atoms bonded in a set ratio, and mixtures are not pure with no set ratio. - Examples of each are given, along with explanations of solutions, saturation levels

1. You Will Need:
1. Pencil, Colored pencils
2. Elements, Compounds and
Mixtures – 1 sheet 2 sides –
Bookshelf – This is only Part 2
3. Elements, Compounds and
Mixtures – 1 sheet 2 sides – Part 1
Bookshelf – Picked up on Friday
4. Log #3 – Update with earned Points.

2. Project Grades
1. ____/305 with 15 EC points
possible
Please check your grades on-line. I
will be inputting report card grades
this afternoon.

3. In Charge of Leading
Discussion
1. Log into Learning Point
2. Daily Assignments
3. This Week
4. Open “Elements, Compounds
and Mixtures” slide share
5. Use your abbreviation skills
6. R & R – Pgs 1 & 2

4. Elements are pure substances made of
only one kind of atom.
1. As we have learned, atoms are tiny
structures found in all matter.
2. Most substances contain many
different atoms.
3. It is how those atoms are arranged
that determine whether you have an
element, compound or mixture.

5. 1. One kind of atom
2. Pure (because all particles are the
same)
3. Smallest particle to retain
identity of the element
4. Separated only in nuclear
reactions

6. Particles look like:
Every atom looks
exactly the same
w/ the same
number of protons
Oxygen
Hydrogen
1
1
1
8
8
8

7. Example:
Your Example?
Aluminum: Every
atom of aluminum
in this can is
exactly the same

8. 1. Two or more kinds of atoms
chemically bonded
2. Pure (because all particles are the
same)
3. Smallest particle to retain the
identity of the compound (SET RATIO
of particles)
4. Separated or rearranged in
chemical reactions

9. Particles look like:
Every compound
looks exactly the
same w/ the same
set ratio
Carbon Dioxide –
CO2
Sodium Chloride -
NaCl

10. Example:
Your Example?
Salt: Every
molecule of the
compound NaCl is
exactly the same

11. 1. Two or more elements and/or
compounds blended together
physically
2. Not pure (because all the
particles are not the same)
3. Separation through distillation,
magnetic, evaporation, density,
or particle size
4. No set ratio

12. Particles look like:
Each particle keeps its
own identity….they are
just “blended” together
Mixture #1
Mixture #2

13. Examples:
Your Examples?
Heterogeneous: Different
components are easy to see in this
type of blending
Homogeneous: Different components
are difficult to see because they are
evenly distributed

15. Compound

17. Mixture

18. 1. A solution is a mixture where all the
components blend together to look
like one substance.
2. A solution is a homogeneous mixture
that appears to be a single
substance.
3. The solution is composed of particles
of two or more substances that are
distributed evenly among each other
and have the same appearance and
properties throughout.

19. 1. In solutions, the SOLUTE is the substance
that is being dissolved and usually is the
smaller quantity in the mixture.
2. The SOLVENT is the substance in which
the solute is dissolved and usually is the
larger quantity in the mixture.
3. It is the SOLVENT that is doing the
dissolving.
4. Go to page 144-145 in your textbook:
Give examples of solutions in various
states.

20. • Homogeneous: 2 or more
things evenly blended and
disappear into each other.
• Solute – Smaller quantity by %
• Solvent – Larger quantity by %
• Solution – a homogeneous
mixture

21. • Heterogeneous: 2 or more
things put together and still
can be seen.
• No set RATIO.

22. Have you ever put sugar into lemonade
and seen the grains of sugar sink to
the bottom and not dissolve?
This is because the lemonade
(solution) is supersaturated. In other
words, there is not enough water
(solvent) to completely dissolve the
sugar (solute).
Temperature and Pressure can affect
saturation levels.

23. Saturation Level What does this
mean?
What does this look
like? (color)
Unsaturated
Saturated
Supersaturated
•Mixture contains more
solvent than solute
•Able to dissolve more
solute
•Mixture contains the %
of solute completely
dissolved by solvent
•No able to dissolve
more solute
•Mixture contains the %
of solute unable to be
dissolved by the % of
solvent at the given
temp.
High temp usually = higher solubility

24. 1. We now know the definition of
Element, Compounds & Mixtures
2. What do their particles look like?

25. 1. You should have completed pgs. 1-3,
at minimum, of Elements,
Compounds and Mixtures –
Thursday Due Date
2. Bohr Model and Lewis Dot Diagrams
+ Density Review – Was Due on
Friday – 1st grade of 4th quarter