Which 2 statements describe a mixture? 1. It includes atoms of different elements.
2. Its parts can be separated using physical means.
3. It can result from chemical bonding.
4. It is a pure substance.

It's parts can be separated using physical means.It is a pure substance.

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