3- Which element in the 5th period of periodic table and in the d block is not a transition metal when considering its electronic configuration

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

the answer would be b i believe