Which of the following represents a polar covalent bond A. O-O
B. Ca-O
C. H-C1
D. H-S

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

Matches the chemical name of each oxide of phosphorus to its chemical formula

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand