2. Why do you believe knowing how elements and compounds react together is essential in everyday matters? 3. Some elements are more "reactive" than other elements; why do you think this is?

All other atoms have less stable electron numbers, so they react with each other and share electrons to be more stable. The most reactive elements tend to be short one or two electron or have one or two extra. An element's reactivity depends on how its electrons are arranged. ... Conversely, if the outer shell is occupied by just one solitary electron (ie sodium) this electron can readily be shared with another atom, making it highly reactive.

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying