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Question 4.11: Using Group Numbers Using the periodic table, write the grou...

Using Group Numbers

Using the periodic table, write the group number and the number of valence electrons for each of the following elements:

a. cesium                b. iodine

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a. Cesium (Cs) is in Group 1A (1); cesium has one valence electron.

b. Iodine (I) is in Group 7A (17); iodine has seven valence electrons.

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