What category is most of the elements part of

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Which of the following molecules is polar? c3h7oh c2h5cooh