Chemistry Project- Adding with Electrons

This five-page PDF document includes a sample page, two worksheets for students, and an a swear key. In each of the 12 chemistry word problems about electrons, students are given the number of electrons in one shell of each atom (either the inner shell or the outer shell. They then have to figure out how many electrons are in the remaining shell. Here is an example: A lithium atom has 3 total electrons. There is 1 electron in the outer shell. How many electrons are in the inner shell? Draw the electrons on the atom’s shells. Write the unknown addend in the equation. So the math itself is simple; it is just finding unknown addends, but the connection to chemistry is COOL, and students draw the electrons on atoms of different elements. I love making cross-curricular connections, and kids enjoy them too, hence my interest in making chemistry into a math worksheet.