Chapter 2 - Atoms, Molecules, and Ions - Questions and Exercises - Questions - Page 82: 2.12

The number 4 behind P indicates that there are 4 individual atoms of Phosphorus. $P_{4}$ implies that it is a phosphorus molecule with 4 phosphorus atoms bonded together.

Work Step by Step

The number 4 behind P indicates that there are 4 individual atoms of Phosphorus. $P_{4}$ implies that it is a phosphorus molecule with 4 phosphorus atoms bonded together.

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