Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago? (1 point)
Atoms are tiny indivisible particles.
Atoms of the same element are identical.
Compounds are made by combining atoms.
Atoms of different elements can combine with one another in simple whole number ratios.

Question

Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago?  (1 point)
Atoms are tiny indivisible particles.
Atoms of the same element are identical.
Compounds are made by combining atoms.
Atoms of different elements can combine with one another in simple whole number ratios.

anonymous · Answer

atoms of the same  element are identical  -  isotopes of same element have different mass numbers