Using the periodic table, predict the charges of the ions of the following element:
Okay guys, so here we have to predict the charge of the strontium ion. Where is strontium located?
Strontium is going to be in group IIA. So what does this mean? It means that we need to lose two electrons in order to reach the noble gas configuration. So to predict the charge, it's going to be positive two. We say positive, because positive means that we need to lose that many electrons. So it's going to be Sr+2.
Let's move on.