What did chemists recognize/claim by the mid 1800s?

Determine the reaction and balance the following equations urgent due in the morning

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.

From the choices provided below, list the reagent(s) in order that will react with cyclopentanone to form the compound shown below.