Elements, moles and masses
This page contains an array for 107 elements. When you
press "New Problem" a problem is generated by filling two of the cells in
the first table. Put the correct value in the empty cell and press
"Check Ans." Results appear in the second table. You need a periodic table or list of
elements and atomic weights to use this page.
- If you miss a problem three times, pressing the "Show Answer" will cause the correct answer to appear.