Date: 11-3-14 - Have a periodic table out Day Plan: 1) Homework (Book page 86,87) Problems 10,11,16,39,40 2) Notes on Periodic Trends 3) Conclusion to It’s All in the card Opener: List the three classes of elements on the periodic table. Write down two elements from each class.

F0r Notes have out your periodic table (Any one your regular using) Its all in the cards activity

Periodic Table & Trends Notes F Periodic Table & Trends A) Metalloids B) Periodic Trends 1) Atomic Number 2) General Reactivity 3) Atomic Size 4) Ionization 5) Electronegativity

A) Metalloid Alternate title: semimetal boron, silicon, germanium, arsenic, antimony, and tellurium, polonium and astatine. Alternate title: semimetal Metalloid, a chemical element with properties in-between those of typical metals and nonmetals. Metalloids have electronic structures intermediate between the nearly empty outer electron shells of the typical metals and the nearly filled electron shells of the nonmetals. Most of these elements are important industrial materials, being used to make transistors and other semiconductor devices, ceramics, solar batteries, and certain polymers. Metalloids are usually brittle, somewhat shiny solids that behave as electrical insulators at room temperature

The Metalloids are: Boron Silicon Germanium Arsenic Antimony Tellurium Polonium

B) Periodic Trends Periodic trends are specific patterns that are present in the periodic table. These patterns illustrate different aspects of a certain element, including its size and its properties with electrons.

1) Atomic Number – Increase through a period 2) General Reactivity (On your Periodic Table)

3) Atomic Size Atomic Radius ½ of the distance between the nuclei of two joined atoms of the same element Atomic Radius Size Increases from top to bottom within a group Increase from Right to Left across a period

Atomic Size  WHY?! Decreases across a period Periodic Trends Group Trends Decreases across a period Increase in # of (P) draws in (e-) closer Increases down a group Adding (P) to nucleus BUT Increase in the # of energy levels Shields the outer electrons from the attraction of protons in the nucleus

4) Ionization An atom or group of atoms that have a positive or negative charge Formed when electrons are transferred between atoms

Non-Metals Ions Continued Metals Tend to lose electrons Form cations: Positively charged ions More protons than electrons Tend to gain electrons Form anions: Negatively charged ions More electrons than protons

5 ) Electronegative 4) Ionization Energy Energy required to remove an electron from an atom Ionization energy: Decreases from top to bottom in a group Increases left to right across a period 5 ) Electronegative

Should be able to complete It’s all in the cards activity 5- Chart #1 6- Write Conclusion

Ionic Size Lose e-’s Size decreases Gain e-’s Size Increases Cation Anion Lose e-’s Size decreases Gain e-’s Size Increases

Ionic Size Size of cation decreases Size of anion decreases Size generally increases