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Group Summary Activity

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. Group Summary. Melting/boiling points increase down the column Chemical reactivity increases down a column

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Group Summary Activity

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  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 • Melting/boiling points increase down the column • Chemical reactivity increases down a column • The bottom elements have been known to form compounds, the top three have not. • ns2np6 • All elements are stable, unreactive gases. ANSWER: Group #8 – Noble Gases Jodi Grack; Wayzata High School

  3. Group Summary • Melting/boiling points decrease down the column • Highly reactive group; Chemical reactivity increases down a column • Soft and very malleable • None of them exist uncombined in nature • React violently with water • Lowest ionization energies within each period • Lowest electronegativity within each period • Have one valence electron • Have an effective nuclear charge = +1 • ns1 ANSWER: Group #1 – Alkali Metals Jodi Grack; Wayzata High School

  4. Group Summary • Melting/boiling points decrease down the column • Fairly reactive; Chemical reactivity increases down a column • malleable • React moderately with water to form alkaline solutions (except one element) • Have two valence electrons • Have an effective nuclear charge = +2 • ns2 ANSWER: Group #2 – Alkaline Earth Metals Jodi Grack; Wayzata High School

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

  6. Group Summary • Melting/boiling points increase down columns. • Reactivity increases up the column. • Highly reactive elements • Contains solids, a liquid, and gases • All nonmetals • Exist as diatomic molecules • Contain 1 unpaired p-electron • Have seven valence electrons • Have relatively large ionization energies • Have the largest electronegativities within their period • Form -1 ions • ns2np5 ANSWER: Group #7 – Halogens Jodi Grack; Wayzata High School

  7. Group Summary • Fairly reactive elements • Contain 2 unpaired p-electrons • Form -2 ions • Have 6 valence electrons • Some exist as gases, some as solids • ns2np4 ANSWER: Group #6 – Oxygen Group Jodi Grack; Wayzata High School

  8. Group Summary • Its metals form +3 ions (and sometimes +1 ions) • Contains one metalloid • All elements are solids • Contain one unpaired p-electron, the other p-orbitals are empty • ns2np1 ANSWER: Group #3 – Boron Group Jodi Grack; Wayzata High School

  9. Group Summary • Relatively unreactive elements • Metals form +2 and +4 ions • Contains 4 valence electrons • All are solids • Have 2 unpaired p-electrons • ns2np2 ANSWER: Group #4 – Carbon Group Jodi Grack; Wayzata High School

  10. Group Summary • Relatively unreactive • Nonmetals form -3 ions • Some gases and some solids • Metal, nonmetal and metalloids • Has 3 unpaired p-electrons • Contains 5 valence electrons • ns2np3 ANSWER: Group #5 – Nitrogen Group Jodi Grack; Wayzata High School

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

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