Question

electronic structure and chemical bonding interpreting the electron configuration of an atom or atomic ion in noble - an atomic anion with a charge of - 1 has the following electron configuration: ne 3s²3p⁶ what is the chemical symbol for the ion? how many electrons does the ion have? how many 3p electrons are in the ion?

Explanation:

Step1: Determine the element based on electron - configuration

The electron - configuration [Ne]3s²3p⁶ represents a noble - gas like configuration. Since the ion has a charge of - 1, we first find the neutral atom's electron number. The [Ne] part has 10 electrons, and 3s²3p⁶ has 2 + 6=8 electrons. So the total number of electrons in the ion is 10 + 8 = 18. The neutral atom would have 17 electrons (because the ion has a - 1 charge). The element with 17 electrons is chlorine (Cl), and the ion is Cl⁻.

Step2: Calculate the number of electrons in the ion

As calculated above, [Ne] has 10 electrons and 3s²3p⁶ has 8 electrons. So the total number of electrons in the ion is 10+8 = 18.

Step3: Identify the number of 3p electrons

The electron - configuration shows 3p⁶, so there are 6 3p electrons.

Answer:

1. Cl⁻
2. 18
3. 6