What is the difference between an element and a compound in terms of these models?

Write a balanced equation showing the formation of copper (ii) nitrite from its elements

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes? or no? this question is worth 20 points! let it be correct!

Nthis lab, you will do experiments to identify types of changes. using the question format you learned (shown above), write an investigative question that you can answer by doing these experiments