2. A diagram in a chemistry book shows a magnified view of a flask of air. What do you suppose is between the dots (which represent air molecules)?
A. Air b. Dust C. Pollutants D. Oxygen E. Nothing

1. combine iron and copper (ii) sulfate solution. (hint: iron will form the iron (iii) ion) fe + cuso4 → 2. combine lead (ii) nitrate and potassium iodide solutions. pb(no3)2+ kl → 3. combine magnesium metal and hydrochloric acid solution. mg + hcl → 4. electrolysis (splitting) of water. h2o → 5. burning magnesium. mg + o2 →

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Nan element’s square on the periodic table, the number with the greatest numerical value represents the