Able Quote by Stanislao Cannizzaro
“Compare ... the various quantities of the same element contained in the molecule of the free substance and in those of all its different compounds and you will not be able to escape the following law: The different quantities of the same element contained in different molecules are all whole multiples of one and the same quantity, which always being entire, has the right to be called an atom.”
About This Quote
Source Treatise: On the Atomic Theory, 1808
Elements combine in whole-number ratios; this regularity defines the atom as a fundamental unit.
In simple terms: Elements combine in whole-number ratios.
Key Takeaway
Recognize the atom's role in chemistry.
Themes
chemistry
atoms
quantitative law
science
education
Mood
analytical
educational
Type
scientific
foundational
When to use this quote
- lab experiments
- teaching chemistry
- industrial synthesis
Key Concepts
Stoichiometry
atomic theory
chemical composition
Questions to Reflect On
- Why are whole-number ratios important?
- How does this law affect modern chemistry?
A Different Perspective
Complex compounds may not fit simple ratios.
![“[This] may prove to be the beginning of some embracing generalization, which will throw light, not only on radioactive processes, but on elements in general and the Periodic Law… Chemical homogeneity is no longer a guarantee that any supposed element is not a mixture of several of different atomic…” quote by Frederick Soddy](https://sms4smile.com/quotes/img-quotes/955/frederick-soddy-16246_chemicals_this-may-prove-to-be-the-beginning-of-so_3223600.jpg)
