One of the Features of Dalton's Atomic Theory No Longer

question 11

Multiple Choice

One of the features of Dalton's atomic theory no longer considered to be correct is: All atoms of each element are identical in every respect.Which of the following is the best explanation of why this feature is no longer considered valid?

• A)The existence of isotopes
• B)The existence of ions
• C)Natural variation in the mass of the proton
• D)Natural variation in the mass of the neutron
• E)Natural variation in the masses of the proton and the neutron

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