Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Concept explainers

Atoms and Molecules
An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.
Question

Tell which of the following statements of Dalton's atomic theory is in disagreement with the existence of isotopes:

1. Each element is made of tiny particles called Aatoms.

2. The atoms of a given element are identical: the atoms of a different elements are different in some fundamental way.

3. Chemical compounds are formed when atoms combine with each other. A given compound always has the same relative numbers and types of atoms.

4. Chemical reactions involve reorganization of the atoms - changes in the way they are combined. The atoms themselves are not changed in a chemical reaction 

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