Question and answer
Using his observations, Dalton developed a theory that A. different elements have different masses and sizes. B. different elements have different electron configurations. C. different elements have different subatomic particles. D. different elements have different electrical charges.
The answer is A. different elements have different masses and sizes.
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User: Using his observations, Dalton developed a theory that A. different elements have different masses and sizes. B. different elements have different electron configurations. C. different elements have different subatomic particles. D. different elements have different electrical charges.

Weegy: The answer is A. different elements have different masses and sizes.
ephraimzRN|Points 1791|

User: Thomson was the first scientist to experimentally question A. the existence of positive and negative particles within the atom. B. the existence of a nucleus within the atom. C. the existence of the atom. D. the existence of neutrons.





Weegy: The answer is: A. the existence of positive and negative particles within the atom.
Expert answered|sharpies|Points 6604|

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Asked 2/14/2012 7:41:32 AM
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For multiple choice questions, please type out full answers - not just the letter.
Added 2/7/2012 7:01:58 AM
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