How do i determine the value for the smallest increment on each cylinder

You can tell by how many of the smallest increments there are and the first big number. in this case for number 1 each increment would be worth 1, because it reaches ten and has ten increments. While the one next to it would be worth 2.5, because 10 divided by four equals 2.5. Hope this helps!

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

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