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Day 4 1-23 1.The elements in group 17 are called the ____________. 2.They all have ____ valence elecs. 3.They are the __________ reactive nonmetals.

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Presentation on theme: "Day 4 1-23 1.The elements in group 17 are called the ____________. 2.They all have ____ valence elecs. 3.They are the __________ reactive nonmetals."— Presentation transcript:

1 Day 4 1-23 1.The elements in group 17 are called the ____________. 2.They all have ____ valence elecs. 3.They are the __________ reactive nonmetals.

2 Day 5 1-24 1.The elements in group 2 are called the ____________. 2.They all have ____ valence elecs.

3 How is the periodic table arranged? Day 2 1-19

4 Online Assignment shssci.wikispaces.com

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6 Metals Excellent conductors (Sea of electrons) even as solids Mobile electrons Metals are malleable and ductile Can be pounded into sheet Can be pulled into wire

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8 Periodic Trends Atomic radius: - Measure of size – radius of an atom

9 Periodic Trends What are ions? - atoms that are charged due to the loss or gain of electrons - If an atom loses elecs. it becomes smaller and positive - If an atom gains elecs. it becomes larger and negative Notes page 4

10 Periodic Trends What are ions? - If an atom loses elecs. it becomes smaller - If an atom gains elecs. it becomes larger PAGE 176-179 Which elements gain elecs.? Which elements lose elecs.? Pattern?

11 Periodic Trends Elements on the right side of the periodic table form _________ ions Elements in the same group form ___________ ions negative The same

12 Periodic Trends What’s bigger: F or F - Na or Na + Na or Rb Na of Al F or Cl -

13 Quick Draw Group Halogens Reactivity Period Transition metals Atomic radius

14 Day 6 1-25 1.Which of the following are larger? F OR S -2 2. Give at least 2 reasons why.

15 Day 6 1-25 1.Which of the following are larger? Ca OR Sr Cs OR Cs +1 Rb OR Ca +2

16 Question of the Day 1. What element is in Group 13, Period 3? 2. Name an element in Group 4 3. How many valence electrons in Xe? Day 1 1-26

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18 Octet rule – Atoms tend to gain, lose, or share electrons in order to acquire a full set of valence electrons (8) - 2 for H, He, Li, Be, + B notes page 6

19 Electronegativity – ability to attract electrons in a bond Na—Cl … In the compound above electrons shift toward Cl because it is more electronegative!

20 What is electronegativity? How does it increase on the p. t. ? Electronegativity – ability to attract electrons in a bond

21 How does it increase on the p. t. ? In this bond: Mg—O, which way do elecs. Shift? WHY? O, > electroneg.

22 Add the following trends: Reactivity Size (atomic radius) Electronegativity

23 Assignments Online assignment = shssci.wikispaces.com Read section 6.3 and complete #s 18, 19, 21, 22, 24, 25 on page 182 BOTH DUE BY THE END OF THE PERIOD!!!

24 Ionization energy Fluorine Noble gas Inert Group 17 Malleable Ductile Alkali metals Francium Period 4 Electronegativity Octet Rule Double periods

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26 C B A

27 Atomic mass *** _________ *** _______ Similar properties: _______________ __________________ (groups) Families

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