A specific isotope of an element is known to have 15 protons and 16 neutrons.Which symbol would properly represent this isotope?
E)none of the above

Question

Quizplus · Accepted Answer

The symbol for an element includes the atomic number (number of protons) as a subscript and the mass number (number of protons and neutrons) as a superscript. Therefore, the symbol for an isotope with 15 protons and 16 neutrons would be: 15^31X, where X represents the element symbol. The only option that matches this isotope is option B, where X represents phosphorus (P).

A Specific Isotope of an Element Is Known to Have