Which compound is a pure substance containing atoms of different elements bound together and is uniform throughout?

Which element would mostly likely have an electron affinity measuring closest to zero

Which of the following is most likely true about water in chemical solutions?

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules