Modeling Nuclear Changes project. Help me fill out the table. Also if anyone has the full thing done that would be lit.

What substance has a mass of 9.5g and volume of 2.1cm^3

State one important difference between a physical change and a chemical change?

Which statement justifies that hydrogen peroxide (h2o2) is a polar molecule? the o – h bond is nonpolar and the molecule is asymmetric. the o – h bond is nonpolar and the molecule is symmetric. the o – h bond is polar and the molecule is asymmetric. the o – h bond is polar and the molecule is symmetric.