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Chemistry: The Periodic Table and Periodicity

Name: _____ per: _____ Date: _____ chemistry : The Periodic Table and Periodicity . 1. By what property did Mendeleev arrange the elements? 2. By what property did Moseley suggest that the Periodic Table be arranged? 3. What is the Periodic law? 4. What is a period? How many are there in the Periodic Table ? 5. What is a group (also called a family)? How many are there in the Periodic Table ? 6. State the number of valence electrons in an atom of: a. sulfur b. calcium c. chlorine d. arsenic 7. Give the names and chemical symbols for the elements that correspond to these atomic numbers: a.

NOBLE GASES 23. What is the name given to the group of elements that have the following valence shell electron configurations? a. s2 b. s2p6 c. s2p5 d. s1 ALKALINE EARTH METALS NOBLE GASES HALOGENS ALKALI METALS 24. List the three lightest members of the noble gases. He, Ne, Ar 25. List all of the alkali metals. Li, Na, K, Rb, Cs, Fr 26.

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