Formulas and Atom Counting - Directions

Using the Formulas and Atom Counting Concept Builder is quite simple. There are three difficulty levels in all. Each question in every difficulty level has the same task to accomplish - count the number of atoms of each element present is a set of formulas. A set of formulas is given and a listing of the elements present in the formulas are shown. For each element, enter the total number of atoms of that element present in the formula(s). The number can be entered directly into the field using the physical keyboard. If a physical keyboard is not available on your device, simply tap on the Number Pad icon displayed to the right of the answer field. When you do, a built-in, easy-to-use number pad pops up that allows you to enter the number of atoms of that element. When done, tap on the Enter button (or the Tap to Close button). Once you are satisfied with your answers, tap on the Check Answer button. If every field is complete, then your answer will be evaluated and your Progress Report will be updated. If you have left some empty fields, then none of the answers will be checked and the empty field(s) will be highlighted for your attention. Your goal is to earn "Stars" and to complete one or more difficulty levels. Stars are earned when you show success on a particular question. Once you show success on all the questions for a particular level, you will earn the Trophy for that level.