A scientist has compiled the table below to show the composition of an unknown atom.
Protons|neutrons|electrons
15 16 15
Sulfur Sulfur Silicon Silicon Nitrogen Nitrogen Phosphorus
Based on the table, the unknown atom has 15 protons, 16 neutrons, and 15 electrons.
Therefore, the unknown atom is Phosphorus (P), which has 15 protons, 16 neutrons, and 15 electrons.