Question

1. an atom has an atomic number of 17 and a mass number of 35. if this atom becomes an ion with a 1 - charge, which statement correctly describes the resulting ion? the ion has 17 protons, 18 neutrons, and 16 electrons with a total mass of 35 amu the ion has 17 protons, 18 neutrons, and 18 electrons with a total mass of 35 amu the ion has 17 protons, 17 neutrons, and 18 electrons with a total mass of 35 amu the ion has 16 protons, 18 neutrons, and 18 electrons with a total mass of 35 amu

Explanation:

Step1: Recall atomic number and mass - number concepts

Atomic number = number of protons. Given atomic number = 17, so number of protons = 17. Mass number = number of protons + number of neutrons. Given mass number = 35, so number of neutrons = 35 - 17=18.

Step2: Determine electron - number for ion

A 1 - charge on an ion means it has gained 1 electron. Neutral atom has number of electrons equal to number of protons (17). So, ion has 17 + 1=18 electrons. Total mass of ion is approximately equal to mass number (35 amu) as electrons have negligible mass compared to protons and neutrons.

Answer:

The ion has 17 protons, 18 neutrons, and 18 electrons with a total mass of 35 amu.