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Halogens

Halogens. http://schools-wikipedia.org/wp/h/Halogen.htm. Today’s Lesson. Re-cap of Halogens & Homework Experiment Write Up. The Halogens. Halogens are four reactive elements found in Group 7. They have 7 electrons in their outer shell so are very reactive. They are non-metals.

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Halogens

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  1. Halogens http://schools-wikipedia.org/wp/h/Halogen.htm

  2. Today’s Lesson • Re-cap of Halogens & Homework • Experiment Write Up

  3. The Halogens • Halogens are four reactive elements found in Group 7. • They have 7 electrons in their outer shell so are very reactive. They are non-metals. • The smaller the Period number, the more reactive they are. • They work in the opposite direction of the Alkali Metals (Group 1) which are more reactive the larger the Period number.

  4. Halogens Continued • Halogens have 7 electrons in their outer shell. Atoms are stable when they have full electron shells, so halogens are reactive as they try and get that one last electron. • Halogens can also displace one another. For example, Bromine will displace Iodine, while Chlorine will displace Bromine. • Hint – a more reactive halogen will always replace a less reactive halogen

  5. Questions • Read Page 98-99 and answer Q 1-6 • For homework, read How Electrons Are Arranged (Page 16-17) and answer Q1-6 • We will also be completing our write up. If you can finish it to Risk Assessment this lesson – your group may be able to start next week…

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