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Thursday, October 24, 2014

Thursday, October 24, 2014. In your journal, write today’s date. Then write the following notes. Physical Properties of Matter Characteristics observed without changing the composition of the matter Examples: color, shape, smell, texture, mass, density, state of matter, melting point

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Thursday, October 24, 2014

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  1. Thursday, October 24, 2014 • In your journal, write today’s date. Then write the following notes. Physical Properties of Matter • Characteristics observed without changing the composition of the matter • Examples: color, shape, smell, texture, mass, density, state of matter, melting point What elements are Al, S, Pb, Fe, C and Cu?

  2. STATE OF MATTER IS A PHYSICAL PROPERTY All elements can exist in a solid, liquid, gas, or plasma state under the right temperatures.

  3. Change of State is a Physical Change • Tungsten has the highest melting point of any element - 3422°C • It is hard to study because we can’t find a container to hold it in. There is a compound that has a slightly higher melting point but melting tungsten in it has not been done. • Liquid tungsten is so hot, if you dropped it into a lava flow, the lava would freeze the tungsten.

  4. Gallium • What is the atomic number of Gallium? • What does that tell you about the atomic structure of gallium? (protons identify the element) • How many electron rings? Valence electrons? • Gallium is a metal with a very low melting point – just above room temperature. • http://www.youtube.com/watch?v=cvRcUeWjBu0

  5. Today’s Lab • Today we will be looking at some physical properties of elements. The properties we will discover are: • Conductivity vs Insulation (does it conduct electricity) • Magnetic vs Non-Magnetic • Luster (shiny) vs Dull • Malleability (moldable or shapeable) vs Brittle (breaks easily)

  6. Physical Properties of Metals Station 1 __Conductor_____Insulator_ Station 2 Magnetic_ Non-Magnetic Station 3 Luster Dull____ Station 4 Malleable _Brittle __

  7. Rules and Guidelines for the Lab • Demonstrate safety practices • Read each station card carefully before beginning your test • Follow all directions • Use your science journal (data table) to record your data • Discuss possible explanations • Leave your station clean and organized.

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