An atom:
1) is the smallest whole unit of matter
2) can form one or more elements
3) is the smallest whole unit of matter with the properties of a specific element
4) all of the above

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.