Phosphorus Has an Atomic Number of 15, So What Is

question 26

Multiple Choice

Phosphorus has an atomic number of 15, so what is the distribution of its electrons?

• A)The first energy level has eight and the second has seven.
• B)The first energy level has two, the second has eight, and the third has five.
• C)The first energy level has two and the second has 13.
• D)The first, second, and third energy levels have five electrons each.
• E)The electron arrangement cannot be determined from the atomic number alone.

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Definitions:

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