Question

choose all the correct observations and conclusions of john dalton.
electrons circled the nucleus of the atom
common substances always broke down into the same elements in the same proportions
various compounds were combinations of atoms of different elements
atoms could not be created nor destroyed
protons has a positive charge

Explanation:

John Dalton's atomic theory included that common substances decompose into the same elements in fixed - proportions, compounds are combinations of different - element atoms, and atoms are indestructible and uncreatable. The idea of electrons orbiting the nucleus was part of later models (like Bohr's model), and the discovery of protons and their charge was also after Dalton's time.

Answer:

• Common substances always broke down into the same elements in the same proportions
• various compounds were combinations of atoms of different elements
• atoms could not be created nor destroyed