Calcium atoms have 20 protons, but tend to form ions with a 2+ charge. How many electrons does the ion have? *

What is the formula for calcium iodide

Arecipe calls for 1.2 cups of oil. how many liters of oil is this?

In a reaction equation, where are the products located? a.) above the arrow b.) to the right of the arrow c.) to the left of the arrow d.) below the arrow