A particle that contains 8 protons, 9 neutrons, and 7 electrons could be written as:

Question

Quizplus · Accepted Answer

The particle described has 8 protons, 9 neutrons, and 7 electrons. The number of protons (8) identifies it as oxygen (O), which has an atomic number of 8. The mass number is the sum of protons and neutrons, which is 17 (8 protons + 9 neutrons). Since it has 7 electrons, one less than its number of protons, it carries a +1 charge. The correct notation for this ion would include the mass number (17), the atomic symbol (O), and the charge (+1), which matches the format in choice E.

A Particle That Contains 8 Protons, 9 Neutrons, and 7