Properties of the Periodic Table

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Presentation transcript:

Properties of the Periodic Table

Periodic Table: Atomic number – the identity of an element Row = Period (Horizontal Rows #1-7)             The atomic # increases as you go from left to right             Atomic# = # protons (p) = # electrons for a neutral atom Properties change somewhat regularly as you go across Column = Group = Family (Vertical Columns #1-18)             Elements in a group have similar chemical properties

Metals, Non metal and metalloids – Summary Table Non metals

To Review: Metals Common Properties - shiny - good electrical/heat conductor - most are solids (room temperature) - malleable (can be hammered) - ductile (can be drawn into fine wire) - high tensile strength (resist breaking when pulled) Unique Properties - mercury (liquid at room temperature) - Group 1 metals can be cut with a knife - variety of colors

- poor conductors of heat & electricity - not as common as metals To Review: Nonmetals Common Properties - poor conductors of heat & electricity - not as common as metals Gases (Room Temperature) - nitrogen, oxygen, fluorine, & chlorine Liquids - bromine Solids - carbon, phosphorous, selenium, sulfur, iodine

- share characteristics with m & nm - all solids at room temperature To Review: Metalloids Common Properties - located between m & nm - share characteristics with m & nm - all solids at room temperature - less malleable than metals - not as brittle as nonmetals - semiconductors of electricity • Metalloid Elements - Boron (B), Antimony (Sb), Silicon (Si), Tellurium (Te), Germanium (Ge), Polonium (Po) - Arsenic (As) (debate-also metal)

The Living Periodic Table Activity When you came in to class today, you should have noticed the desks were arranged a little differently. On your desk is an element identity card. That is the element you will now personate for the remainder of this activity. Make sure you have the following three things: Periodic Table Living Periodic Table – Student Worksheet Living Periodic Table – Element Information Chart

Part 1 Using your periodic table and the information sheet provided, fill in the top section about yourself. If you have any exceptions, they will be listed on your element identity card.

Part 2 Now you will compare your information to the people sitting around you. You will compare to the students on either side of you, the student directly in front of you, and the student directly behind you. Fill in their information on the bottom part of the worksheet using the instructions.

Part 3 On the back of the student worksheet, you will see a space to describe the “trend” you see emerge on the periodic table based on the chart you filled in. For example, if you notice a students’ atomic radius goes from small to large, you could write “Across a period, atomic radius increases.”

Put the completed Living Periodic Table Worksheet in your notebook Put the completed Living Periodic Table Worksheet in your notebook. We will review and take notes on the trends next class.

Periodic Table Flipbook Elements of the same group/family (column) share similar physical and chemical properties – that’s what allowed scientists to group them as such. You will create a “flipbook” to help you record the properties of the families. That way, you don’t have to memorize all of them. You may use this flipbook on the Unit Test and on the Final. Instruction handouts can be found on your table and can also be found online. Use the following slides about the families to copy down their properties.

* Useful for living things in small amts, deadly in large quantities * Red stuff on the tips of matches is P. * 78% of the earth's atmosphere made up of N2, unuseable form

Oxygen is extremely reactive and combines with most other elements