1.5 History of the atom Flashcards
1
Q
Who had the most earliest idea about particles and atoms?
A
The greeks
2
Q
When did the ideas become linked and who did it?
A
- By John Dalton until the early 1800s.
- Had strong experimental evidence
3
Q
What is John Dalton’s description of the atom concluded by his experiment?
A
- Substances were made out of atoms
- Tiny , hard spheres
- Each chemical element had its own atoms that differed from others in their mass.
- Atoms could not be divided or split . The fundamental building blocks of nature.
4
Q
What did John Dalton suggest from chemical reactions?
A
- Atoms re-arranged themselves and combined with other atoms in new ways.
5
Q
How is Dalton’s ideas useful for us today?
A
- Help us to visualise elements , compounds and molecules.
- Models used to describe different arrangement and movement of particles in solids, liquids and gases.
