The Atom: Development Flashcards
Who was the 1st person to propose the idea of atoms?
Democritus
Democritus
He was a Greek philosopher
Dalton’s atomic theory
John Dalton had the theory that atoms existed
The law of constant composition
It is the constant ratio of the composition of atoms in a molecule
The law of simple multiple proportions
Even if an element combines with another, the ratio of the mass of the element will be a whole number
Mixture
A substance that consists of multiple types of elements or compounds that aren’t chemically bonded together
2 types of mixtures
Homogenous and heterogeneous mixtures
Homogenous mixture
A mixture that is consistent throughout the mixture; the same
Heterogeneous mixture
A mixture that isn’t consistent throughout the mixture; different
4 types of mixtures
Solution, suspension, colloid and emulsion
Solution
A homogenous mixture that consists of 2 substances; the solvent and the solute. Usually a liquid
Solvent
The liquid in a solution
Solute
The dissolved substance
Suspension
A heterogeneous mixture with insoluble solid participles settled at the bottom
Colloid
A heterogeneous fluid with insoluble solid participles suspended
