p^3- K^1+A ✓ ✗B ✓ ✓C ✗ ✗D ✗ ✓Which of the following ions have an electronic configuration of 2.8.8?

The electronic configuration of 2.8.8 corresponds to an atom that has 18 electrons. This configuration is typical of the elements in Group 18 of the periodic table, also known as the noble gases. However, since the question asks for ions, we are looking for atoms that have gained or lost electrons to achieve this stable configuration.

1. P^3-: Phosphorus (P) normally has 15 electrons. The 3- charge indicates that it has gained 3 electrons, giving it a total of 18 electrons. So, P^3- has an electronic configuration of 2.8.8.

2. K^1+: Potassium (K) normally has 19 electrons. The 1+ charge indicates that it has lost 1 electron, giving it a total of 18 electrons. So, K^1+ also has an electronic configuration of 2.8.8.

3. A: This is not a recognized symbol for an element in the periodic table.

4. B: This is not a recognized symbol for an element in the periodic table.

5. C: This is not a recognized symbol for an element in the periodic table.

6. D: This is not a recognized symbol for an element in the periodic table.

So, the ions that have an electronic configuration of 2.8.8 are P^3- and K^1+.