Do Now

1
Do Now

• ClO4
• Find
• How many elements are in this compound?
• 2. How many Cl atoms are there?
• 3. How many O atoms are there?
• 4. What is the RATIO of Cl to O atoms?
• 5. How many atoms are there total in this
  compound?

2
Reminders for the week

• Homework is due Friday
• Do Now is due Friday
• Quiz is Friday

3
More practice with reading chemical formulas

• Work on the top of your GUIDED NOTES on your own
• We will review as a class

Some common chemical formulas that represent
different compounds!
4
Guided notes

• You know the drill.
• Listen closely, fill in your notes with the
  bolded, underlined words.
• Eyes on me and the board, mouths closed.

5
Mixtures

• A mixture is matter made up of two or more
  substances that are combined physically
• Each substance retains its own chemical identity
  and properties
• Can be separated by physical means

6
Types of mixtures

• 1. Homogenous
• -A mixture that is the same throughout, uniform
• -These are also called solutions
• -You cannot tell what the individual pieces of
  the mixture are
• -Example Milk, air

7
Types of Mixtures

• 2. Heterogeneous
• -A mixture that is not the same throughout, not
  uniform
• -You can pick out the individual pieces that make
  up the mixture
• -Example Salad, sand and water

8
stations

• Youre scientists, observing real-life mixtures.
• Record at each station whether the mixture is
  heterogeneous or homogenous and explain why you
  think so. Also answer the key question at each
  station
• Take 3 minutes at each station to observe the
  mixtures and discuss with your group

• Expectations
• Working just with your group. Whisper.
• Do not touch the mixtures.
• Rotate only when I tell you to.

9
PICTURE SORT
10
Exit ticket

1. Write down 2 examples of a heterogeneous mixture.
2. Write down 2 examples of a homogenous mixture.
3. Label the pictures below as an element, mixture,
   or compound.