Substance E has 29 protons, 29 electrons, and 34 neutrons. Substance F has 29 protons, 29 electrons, and 38 neutrons. Substances E and F can be categorized as .

29.1-12=17.1the answer is this one

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

B. a graduated substance