1. Group Summary Activity Directions: Go to view- slide show. Click through slides. Clues will be revealed one at a time. See how many clues it takes before you know the group. Jodi Grack; Wayzata High School

2. Group Summary 1) Melting/boiling points increase down the column 2) Chemical reactivity increases down a column 3) The bottom elements have been known to form compounds, the top three have not. 4) ns 2 np 6 5) All elements are stable, unreactive gases. ANSWER: Group #8 – Noble Gases Jodi Grack; Wayzata High School

3. Group Summary 1) Melting/boiling points decrease down the column 2) Highly reactive group; Chemical reactivity increases down a column 3) Soft and very malleable 4) None of them exist uncombined in nature 5) React violently with water 6) Lowest ionization energies within each period 7) Lowest electronegativity within each period 8) Have one valence electron 9) Have an effective nuclear charge = +1 10) ns 1 ANSWER: Group #1 – Alkali Metals Jodi Grack; Wayzata High School

4. Group Summary 1) Melting/boiling points decrease down the column 2) Fairly reactive; Chemical reactivity increases down a column 3) malleable 4) React moderately with water to form alkaline solutions (except one element) 5) Have two valence electrons 6) Have an effective nuclear charge = +2 7) ns 2 ANSWER: Group #2 – Alkaline Earth Metals Jodi Grack; Wayzata High School

5. Group Summary 1) Many of its elements form colored compounds 2) Contains some metals that exist uncombined in nature 3) The trend for metallic properties increases to the left. 4) Contains one metal that exists as a liquid 5) Have two valence electrons, but can form a variety of ions 6) Highest energy electrons fill into d-orbitals ANSWER: Group #2 – Transition Metals Jodi Grack; Wayzata High School

6. Group Summary 1) Melting/boiling points increase down columns. 2) Reactivity increases up the column. 3) Highly reactive elements 4) Contains solids, a liquid, and gases 5) All nonmetals 6) Exist as diatomic molecules 7) Contain 1 unpaired p-electron 8) Have seven valence electrons 9) Have relatively large ionization energies 10) Have the largest electronegativities within their period 11) Form -1 ions 12) ns 2 np 5 ANSWER: Group #7 – Halogens Jodi Grack; Wayzata High School

7. Group Summary 1) Fairly reactive elements 2) Contain 2 unpaired p-electrons 3) Form -2 ions 4) Have 6 valence electrons 5) Some exist as gases, some as solids 6) ns 2 np 4 ANSWER: Group #6 – Oxygen Group Jodi Grack; Wayzata High School

8. Group Summary 1) Its metals form +3 ions (and sometimes +1 ions) 2) Contains one metalloid 3) All elements are solids 4) Contain one unpaired p-electron, the other p-orbitals are empty 5) ns 2 np 1 ANSWER: Group #3 – Boron Group Jodi Grack; Wayzata High School

9. Group Summary 1) Relatively unreactive elements 2) Metals form +2 and +4 ions 3) Contains 4 valence electrons 4) All are solids 5) Have 2 unpaired p-electrons 6) ns 2 np 2 ANSWER: Group #4 – Carbon Group Jodi Grack; Wayzata High School

10. Group Summary 1) Relatively unreactive 2) Nonmetals form -3 ions 3) Some gases and some solids 4) Metal, nonmetal and metalloids 5) Has 3 unpaired p-electrons 6) Contains 5 valence electrons 7) ns 2 np 3 ANSWER: Group #5 – Nitrogen Group Jodi Grack; Wayzata High School

11. Group Summary 1) Most elements are synthetic 2) Many are phosphors 3) Most are radioactive 4) Highest energy electrons fill into f- orbitals ANSWER: Innner Transition metals/Rare Earth Elements (lanthanides & actinides) Jodi Grack; Wayzata High School