If it has a positive charge it is a cation if negative it is an anion .
I attached a chart that will help you know the charges of the elements
<span>Step 1: Ask a question or identify a problem. ...Step 2: Background research. ...Step 3: Form a hypothesis. ...Step 4: Experiment and observe. ...<span>Step 5: Draw a conclusion.</span></span>
The answer is 4.69 x 10⁻¹⁹ I hope this helped!
I believe it is D. Hope this helps you!