1. On a periodic chart (you use it periodically....I crack myself up) how do you determine an elements atomic number? Wh

[answerhappygod]

1. On a periodic chart (you use it periodically....I crack myself up) how do you determine an elements atomic number? What subatomic particle gives us the atomic number is another way of asking the same question.
2. How is the atomic weight determined?
3. What is the difference between a compound and a molecule?
4. What four elements comprise most organisms?
5. What are trace elements? Give an example.
6. Electrons are important for chemical reactions. What are electrons and how do they behave within an atom/element?