Certain species of aquatic organisms are particularly sensitive to environmental changes. Scientists often monitor the behavior, population size, and overall health of these so-called indicator species in order to evaluate the water quality in an ecosystem.

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 →

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

In apex! a liquid heated beyond a certain temperature becomes