Question

which is the symbol for an ion with 26 protons and 23 electrons?
a ( r^{3+} )
b ( v^{3 - } )
c ( fe^{3+} )
d ( fe^{3 - } )

Explanation:

Step1: Determine the element

The number of protons determines the element. An element with 26 protons is iron ($Fe$).

Step2: Calculate the charge

The charge of an ion is calculated as \( \text{Charge}=\text{Number of protons}-\text{Number of electrons} \).
Given protons \( = 26 \) and electrons \( = 23 \), then \( \text{Charge}=26 - 23=3+\).

Answer:

C. \(Fe^{3 +}\)