To Choose: The correct option.
Answer to Problem 38R
The correct option is (C).
Explanation of Solution
Introduction:
Every element has valence electrons in their valence shell. Some of them have a fewer number of valence electron or some of them have a large number of valence electrons. It depends on the group and period of the periodic table.
The given figure is shown below:
The highlighted group of elements in the periodic table is related to halogens. It is also called as group 17. The first 10 electrons are filled in the inner shells and the seven electrons are in the outer shell or valence shells in this group. Hence, the number of electrons in the outer energy level of the highlighted group of elements is 7.
Therefore, the correct option is (C).
Conclusion:
Hence, 7 electrons are n the outer energy levels of the highlighted group.
Chapter 18 Solutions
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
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