Question

Iodine and strontium are reacted together. explain why it is more difficult to predict whether this reaction is more or less reactive than the reaction of bromine and strontium

Answer 1

Predicting the reactivity between iodine and strontium is more difficult than that between bromine and strontium due to the differing reactivities of the halogens, where iodine is less reactive than bromine.

Step-by-step explanation:

It is more difficult to predict the reactivity of the reaction between iodine and strontium compared to the reaction of bromine with strontium because of the position of iodine and bromine in the periodic table, and their relative reactivities. Iodine is the least reactive of the halogens, making it the weakest oxidizing agent.

This is in contrast to bromine, which is higher up on the periodic table and more reactive than iodine. The reactivity trend within the halogen group suggests that since bromine is more reactive than iodine, a reaction between bromine and strontium would be expected to occur more readily than a reaction between iodine and strontium.

However, predicting exact reactivities requires considering other thermodynamic and kinetic factors that can affect how these elements react. Since iodine reacts with metals often requiring heat and is known to be a weaker oxidizing agent compared to other halogens, one might expect that iodine and strontium would react less vigorously than strontium and bromine.

Answer 2

Answer: The reaction between iodine and strontium is less reactive than the reaction of bromine and strontium.

Step-by-step explanation:

Iodine and bromine belong to the same group which is Group 17 of the periodic table. Iodine lies in Period 5 and bromine lies in Period 4.

Reactivity of non-metals is defined as the tendency of the elements to gain electrons easily. This depends on the electronegativity values. More the electronegativity, more will be the reactivity and vice-versa.

Reactivity of non-metals decreases from moving down the group and increases across the period.

The electronegativity of iodine is less than bromine. Hence, it is less reactive than the bromine.

The reaction between strontium and bromine is more favorable because it is the reaction between two reactive elements.

Hence, the reaction between iodine and strontium is less reactive than the reaction of bromine and strontium.