In finding the missing formula below, consider only what is on our class periodic table and cheat sheet. For subscripts, please use full-size numbers. For example, H2O would be entered as H2O. Please don't confuse the letter "o" with the number "zero". Please don't confuse the letter "I" with the letter "l".
Molar Mass (g/mol)
Cation
Anion
Formula
Monoatomic anion with cobalt? The same charge as oxide
90.99