Single Choice

Which of the following postulates of Dalton's atomic theory is challenged by the next generation's scientists?

AAll matter is made of very tiny particles called atoms,
BAtoms are particles, which cannot be created or destroyed in a chemical reaction.
CAtoms of a given elements are identical in mass, shape and chemical properties
Correct Answer
DNone of the above

Solution

According to the postulate of Dalton's atomic theory that 'atoms of a given element are identical in mass, shape and chemical properties' was challenged after the discovery of isotopes by the next generation scientist. After the discovery of mass spectrometry it was found that some elements have same atomic number but different mass number (isotopes).
For example, there are two types of chlorine atoms $$^{35}Cl$$ and $$^{37}Cl$$ having mass $$35$$ amu and $$37$$ amu.
After the discovery of isotopes it was concluded that atoms of all element may not be similar in all respect.

SIMILAR QUESTIONS

Atoms and Molecules

Which of the following is not the basic postulate(s) of Dalton's atomic theory?

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Atoms of different elements combine in :

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Dalton said that ___________ cannot be divided.

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State the postulates of Dalton's Atomic theory.

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Atomic theory of matter was given by ..............?

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Which postulate of Dalton's atomic theory can explain law of definite proportions?

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Give the main postulates of Dalton's atomic theory.

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Which postulate of Dalton's atomic theory is the result of law of conservation of mass given by Lavoisier?

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Which part of Dalton's atomic theory came from the law of constant proportions given by Proust?

Atoms and Molecules

(a) State the various postulates of Dalton's atomic theory of matter. (b) Which postulate of Dalton's atomic theory can explain the law of conservation of mass? (c) Which postulate of Dalton's atomic theory can explain the law of constant proportions?

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