Describe a situation where scientific knowledge was gained through doing an experiment

When determining the types of chemical reactions.

Explanation:

Hello,

In this case, in order to establish the different types of chemical reactions, several experiments are carried out the determine whether a chemical reaction is synthesis, decomposition, double displacement, double displacement or combustion. Such experiments consist on the combination of different of reactants under varied conditions in order the appreciate the reaction behavior over the time, changes in color, temperature changes and formed products that suggest the type of reaction.

Once the observations are set throughout the experiments, one provides the scientific knowledge that in this case will help to differentiate such types of chemical reactions.

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indium, and thallium have three electrons i think