1. Date: 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.

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

3. 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

4. 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

5. The Metalloids are:
Boron
Silicon
Germanium
Arsenic
Antimony
Tellurium
Polonium

6. 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.

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

8. 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

9. 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

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

13. 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

14. 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

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

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

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