Lab Debrief and Particle Diagram Practice

Lab Debrief and Particle Diagram Practice

Classifying Matter

Poll

Yesterday, you did your lab during class time. How did that go?

• Lab? What Lab?

• I was very confused and I could not complete it.

• I managed to complete it, but some things confused me.

• It was easy.

Debriefing Lab 2: Protocols and Classifying Matter

SWBAT differentiate between the phases and types of matter by observing physical characteristics.

Multiple Choice

Which beaker contains a solid?

Multiple Choice

Which beaker is full of stuff that has no definite shape

and no definite volume?

Fill in the Blank

Beaker A contains approximately 150 mL of water.

“H2O (l) has a definite _____________.”

Fill in the Blank

Beaker A contains approximately 150 mL of water.

“H2O (l) has a definite volume but a non-definite _____________.”

Elements!

• Made of one type of atom only.

• The symbol for each element includes one capital letter (Cu).

Element Particle Diagram

Can be monoatomic, diatomic, or triatomic!

Element: only one type of atom

• monoatomic - 1 atom

• ex) He

• diatomic- 2 of the same atoms bonded

• ex) H₂

• triatomic- 3 of the same atoms bonded

• ex) O₃ (ozone)

Compounds!

• Two or more elements chemically combined.

• Compound formulas have more than one capital letter (NaCl).

Compound: 2 or more different elements chemically combined

• circles are connected/attached

• one circle must have different color or be shaded to show it's a different atom

Mixture

A combination of different substances, where the substances retain their original properties.

Mixtures

Multiple Choice

Which particle diagram represents only a compound of element X and element Z?

Multiple Choice

The chart below lists some substances and their symbols. How many of these substances are examples of elements?

• 1

• 2

• 3

• 4

Multiple Choice

What makes elements and compounds different from mixtures? Elements & compounds-

• have a constant composition (pure substances)

• are made of gases

• Will not change when heated

• conduct electric current

Multiple Choice

Which of the following formulas represents a compound?

• 4 He

• 5 O₂ + 3 LiBr

• 2 MgO

• Ag

Multiple Choice

Classify the sample. Look carefully.

• Pure Substance

• Mixture of Elements

• Mixture of Compounds

• Mixture of Element and Compound

Multiple Choice

Which chemical formula could be represented by this sample?

• NaCl
• H₂
• C₆H₁₂O₆
• Cu

Multiple Choice

Classify the Sample.

• Pure Substance

• Mixture of Elements

• Mixture of Compounds

• Mixture of Elements and Compounds

Multiple Choice

What is a pure substance made of two or more elements that are chemically combined called?

• A. element

• B. compound

• C. mixture

Multiple Choice

Classify the sample

• Pure Substance
• Mixture of Elements
• Mixture of Compounds

Multiple Choice

Classify the sample

• Element
• Compound

Multiple Choice

Classify the sample

• Pure substance
• Mixture

Multiple Choice

Which is the best description of one particle of table salt (NaCl)?

• mixture

• compound

• element

Multiple Select

Which beaker(s) contain a pure substance? (check all that apply)

• A

• B

• C

• D

Multiple Choice

Which beaker contains a compound?

• A

• B

• C

• D

Multiple Choice

Which beaker contains only one type of element?

• A

• B

• C

• D

Multiple Choice

In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?

• I

• II

• III

• IV

Today we...

• Debriefed our second lab!

• Reviewed particle diagrams of elements, compounds and mixtures.

• Practiced regents questions!