Classification of Matter

Region 20 ESC Countdown to TAKS Spring 2006 PowerPoint Presentation

Matter word wall

QuickNotes – Molecules vs. Compounds

Molecules Compounds

Two or more elements bonded together Examples: O 2 , F 2 , H 2 0, CH 4 , C 6 H 12 O 6 Molecule made up of atoms from at least two

different

elements Examples: H 2 0, CH 4 , C 6 H 12 O 6

QuickNotes - determining the number of atoms in a molecule Molecule

O 2 F 2 H 2 0 CH 4 C 6 H 12 O 6

# of Atoms

2 2 3 5 24

QuickNotes - identify models of elements, compounds, mixtures

Element Compound Mixture

QuickNotes - classify substances as elements, molecules, compounds, or mixtures

     – sulfur element – O 2 molecule – H 2 O molecule and compound – coins mixtures of metals (alloy) – grape juice mixture (solution)

Elaboration - determine the type of matter based on a description – Use whiteboards to identify as Element, Compound, or Mixture

Classify as an element, compound, or mixture An unknown, clear liquid is given to you in a beaker. You transfer the liquid from the beaker to a clean, empty test-tube, and begin to heat it. After a while, you see vapors (which on further analysis you discover are vapors of water) rising from the test-tube, and pretty soon, all that's left are a few crystals of salt stuck to the edges! How would you classify the unknown liquid?

MIXTURE

Classify as an element, compound, or mixture You have won the world's biggest lottery, for which you are given a huge block of pure, metallic gold. How would you classify this substance ?

ELEMENT

Classify as an element, compound, or mixture A dish is given to you, which contains a blackish yellow powder. When you move a magnet over it, you are amazed to see black particles, (which you find out are iron) fly upwards and get stuck to the magnet, and all that's left in the dish is a yellow powder, which you discover to be sulfur.

How would you classify the original powder?

MIXTURE

Classify as an element, compound, or mixture A substance is analyzed in a laboratory, and when viewed under an electron microscope, it is revealed that it contains only one kind of atom.

How would you classify the substance?

ELEMENT

Classify as an element, compound, or mixture This gas is essential for us, and all other aerobic organisms, to survive. We inhale it along with the air we breathe (of which it forms approximately 21%) and it then helps in the oxidation of glucose in our bodies.

When not in its molecular form, how would you classify the substance?

ELEMENT

Classify as an element, compound, or mixture Water is what all life in the world depends on.

How would you classify water?

COMPOUND

Classify as an element, compound, or mixture A magnesium ribbon is burnt in the air, to form the grayish oxide of magnesium magnesium oxide (MgO). How would you classify this oxide?

COMPOUND

Classify as an element, compound, or mixture How would you classify the air we breathe?

MIXTURE

Classify as an element, compound, or mixture These are given 'symbols' like 'Ar', 'Zn', 'W' and 'Xe', and are arranged in a table called the Periodic Table. How would you classify these substances?

ELEMENTS

Classify as an element, compound, or mixture An unknown silvery powder has a constant melting point and does not chemically or physically separate into other substances. How would you classify the unknown substance?

ELEMENT