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Lesson 7 - Examining and Grouping Elements

Study the characteristics of 25 element samples and learn how they are grouped on the Periodic Table. Explore properties, create categories, and understand trends.

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Lesson 7 - Examining and Grouping Elements

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  1. Lesson 7 - Examining and Grouping Elements You will study the characteristics of 25 element samples and look at how they are grouped on the Periodic Table. Getting Started : Name some characteristic properties.

  2. Lesson 7 - Question What properties of elements can be used in grouping elements?

  3. Lesson 7 Hypothesis If we examine several elements then we can group them in a meaningful way because we can use their characteristic properties.

  4. Lesson 7 Procedure

  5. Lesson 7 Data

  6. Lesson 7 Data

  7. Lesson 7 Data With your lab group: Determine 5 separate categories for the elements studied You must be able to explain your rationale for the groups. Place all elements in one of the 5 groups. Write your categories with the elements in your journal Record your group’s idea on the large construction paper provided.

  8. Lesson 7 - Conclusion • Elements are grouped according to similar chemical and physical properties. • The Periodic Table is used in predicting the chemical and physical properties of elements. • Each element can be identified by its characteristic properties.

  9. Lesson 7 - (1-2) Vocabulary **element - a substance that cannot be broken down into other substances by chemical or physical means. isotope - an atom that has the same number of protons as other atoms of the same element do but has a different number of neutrons; sum of neutrons and protons. reactivity - the readiness of a substance to react chemically.

  10. Lesson 7 - (2-2) Vocabulary conductivity - able to allow electricity or heat to pass through **compound - a pure substance consisting of two or more elements combined conductor - carries electricity or heat magnetic - a substance that is attracted to a magnet.

  11. Lesson 7 - Trends Melting point and boiling point increase towards the middle and then decrease. Reactivity increases going down the group for metals and decreases going down the group for nonmetals. See this link from the Royal Society of Chemistry: http://www.rsc.org/periodic-table/trends

  12. Lesson 7 - Trends

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