Which of the following acts as a catalyst in catalytic converters?

The minerals found in bones are deposited by living cells called

The biosphere of the earth is made up of what compound? organic or inorganic?

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals