Question

10 how many electrons are in this ion? * (0.5 points) enter your answer

Explanation:

Step1: Recall atomic number concept

The atomic number of chlorine (Cl) is 17, which means a neutral Cl atom has 17 electrons.

Step2: Consider ion charge

The ion is $Cl^-$, which has a - 1 charge. This means it has gained 1 electron.

Step3: Calculate electron number

The number of electrons in $Cl^-$ is $17 + 1=18$.

Answer:

18