The number of electrons needed to complete the outer energy level of a phosphorous atom.
Answer to Problem 7STP
The correct option is (C).
Explanation of Solution
Phosphorus atom belongs to group 15. It has 5 outmost electrons. The atomic number of phosphorous is 15, so the electronic configuration of this atom is
Therefore, phosphorous requires 3 electrons to complete its outer shell and get the noble gas configuration. Thus, it gains 3 electrons and shows the oxidation number 3-.
Hence, (A), (B), and (D) are wrong options and (C) is the correct option.
Conclusion:
Hence, 3 electrons are needed to complete the outermost shell.
Chapter 18 Solutions
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
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