Question

what metal is the least reactive metal according to the data?

yes = reaction occurs
no = no reaction occurs
sn
fe
ni
pb

Explanation:

Step1: Analyze the reaction data

In a metal reactivity series, a more reactive metal can displace a less reactive metal from its salt solution. If a metal reacts with a salt solution (marked as "Yes"), it is more reactive than the metal in the salt. If there is no reaction (marked as "No"), the metal in the salt is more reactive.
For \(Fe(NO_3)_2\): \(Ni\), \(Pb\), \(Sn\) do not react with \(Fe(NO_3)_2\). So \(Fe\) is more reactive than \(Ni\), \(Pb\), \(Sn\).
For \(Ni(NO_3)_2\): \(Pb\), \(Sn\) do not react with \(Ni(NO_3)_2\). So \(Ni\) is more reactive than \(Pb\), \(Sn\).
For \(Sn(NO_3)_2\): \(Pb\) does not react with \(Sn(NO_3)_2\). So \(Sn\) is more reactive than \(Pb\).

Answer:

\(Pb\)