Closed system. If the system is not closed, matter or energy can escape from the system. an example of this is if you react magnesium and hydrochloric acid in a open system. The H₂ gas is going to escape making it look like some of the mass disappeared . in that same reaction some in an open system will also loose heat to the surrounding which will make it look like less heat was produced.
The answer is intermediate, so E.
Answer:
a stable octet state
Explanation:
a stable octet state is when all the energy levels of the atoms are filled with electrons and they are stabe
Answer:
John Dalton's Atomic Model Below ⬇
Explanation:
