Why are no organisms labeled between the end zone and 30 yard line on the left side of the field?
scientists disagree about the fossils from this time period.
scientists have not studied that part of the time scale.
there is very little fossil evidence for this time period.
there are too many fossils to name.

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na