. Circle the best choice in each list: (a) largest radius: S2–, Cl–, Cl

(b) smallest atom: Na, Li, Be

(c) largest atom: Fe, Co, Ni

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?