Question

give the ion symbol for the ion that has 16 protons and 18 electrons.

Explanation:

Step1: Identify the element from protons

The number of protons is equal to the atomic number (Z) of an element. Given 16 protons, the element with atomic number 16 is sulfur (S), as the atomic number of sulfur is 16.

Step2: Determine the charge of the ion

The charge of an ion is calculated by the formula: Charge = Number of protons - Number of electrons. Here, number of protons = 16 and number of electrons = 18. So, Charge = \(16 - 18 = -2\).

Step3: Write the ion symbol

The ion symbol is written as the element symbol with the charge as a superscript. For sulfur with a charge of -2, the ion symbol is \(\ce{S^{2-}}\).

Answer:

\(\ce{S^{2-}}\)