Question

1. the electron dot diagram for a neutral atom of chlorine (atomic number 17) is shown below. which of the following symbols represents a chlorine ion with a stable arrangement of eight valence electrons? :cl: ³⁵cl⁻ ³⁵cl²⁻ ³⁵cl¹⁺ ³⁵cl 4. an ion of iron has 26 protons, 30 neutrons, and 23 electrons. what are its atomic number, atomic mass, and net charge? atomic number = 26, atomic mass = 56, net charge = 3+ atomic number = 26, atomic mass = 56, net charge = 3- atomic number = 30, atomic mass = 56, net charge = 3+ atomic number = 56, atomic mass = 26, net charge = 3-

Explanation:

3.

Step1: Understand chlorine's electron - gaining behavior

Chlorine (Cl) has 7 valence electrons in its neutral state. It gains 1 electron to achieve a stable octet (8 - valence - electron) configuration. When it gains an electron, it forms a negatively - charged ion. The symbol for a chlorine ion with a stable octet is \(^{35}Cl^-\).

Step1: Determine the atomic number

The atomic number is equal to the number of protons. Given 26 protons, the atomic number \(Z = 26\).

Step2: Calculate the atomic mass

The atomic mass \(A\) is the sum of protons and neutrons. So, \(A=26 + 30=56\).

Step3: Calculate the net charge

The net charge is the number of protons minus the number of electrons. Charge \(=26-23 = + 3\).

Answer:

\(^{35}Cl^-\)

4.