Look at the four postulates of Dalton\'s theories. One of these postulates turne

Question

Look at the four postulates of Dalton's theories. One of these postulates turned out to be not entirely correct. Can you tell which one it is And why The Law of Constant Composition refers to the consistency of the in a _____________ ; whereas, the Law of Conservation of Mass refers to: The atom consists of 3 subatomic particles, they are: ___, ____, and _____. The nucleus contains only the ___ and ___. It would take the mass of _____ electrons to equal the mass of 1 proton. Notice the information for the element carbon is given as Which is the mass number __ Which is the atomic number Does this representation differ from the information given in the Periodic Table found on the inside cover of your book Isotopes have a different number of ___.

Explanation / Answer

John Dalton, a British school teacher, published his theory about atoms in 1808. His findings were based on experiments and the laws of chemical combination.

Postulates

The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes part in chemical reactions.

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