Which element has n=4 and has three electrons in its valence p orbital?

a) as b) se c) br d) kr e) sc

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

6. what does the symbol ah stand for? o one calorie given off by a reaction the specific heat of a substance the heat capacity of a substance the heat of reaction for a chemical reaction

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