The pictures to the right, show two different models of the atom. Type in the letter of your answer.
Which model best represents Dalton's atomic
theory?

The pictures to the right, show two different models of the atom. Type in the letter of your answer.

Which model best represents Dalton’s atomic theory?  

B

Which model best represents the modifications to the theory that Thomson’s results made necessary?  

A

6.4 cm (max) - 25 cm (min)

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.