The half life of carbon-14 is 5730 years Carbon 14 is used for carbon dating. Carbon dating can tell us how old some objects are
A skeleton was carbon dated. The results showed that there was only 12.5% of the
Orginal amount of carbon-14 left in the skeleton,
Calculate the age of the skeleton,

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