Elements, Compounds, and Mixtures Flashcards
Compound
A pure substance made up of two or more different kinds of atoms.
- Atoms cannot be separated through physical processes.
- Atoms are bonded together chemically in a fixed ratio [H2O, NaCl, Be3Al2(Sio3)6, Fe2O3]
Mixture
A combination of two or more pure substance that are not chemically combined.
- Can be separated by physical means
- Does not have fixed ratios between components.
Pure Substance
A type of matter that cannot be broken down into simpler components without undergoing a chemical change.
-Either a compound or element
Homogeneous Mixture
A mixture that appears as one phase and in which the particles have uniform characteristics throughout
-Salt water
Heterogeneous Mixture
A mixture that contains more than one phase and in which the characteristics of the particles vary throughout the mixture
-Soil
Examples of Mixtures
Salt Water, Soil, Tea, Steel, Air
Seperation of Mixtures
Sorting, Filtration, Distilation, Chromatography
Element
A pure substance consisting of only one type of atom.
- Sodium(Na)
- Chlorine(Cl)
- Iron(Fe)
- Oxygen(O2)
Solutions
A homogeneous mixture that is made up of two or more substances that appear as one phase.
Solvent
The substance that dissolves the solute in a solution
Solute
The substance that gets dissolved by the solvent in a solution.
Suspension
A type of heterogeneous mixture containing particles large enough to settle out or capable of being filtered out.
- Muddy river
- Flour-&-Water mixture
- Blood
Colloids
A class of suspension with smaller particles that are dispersed in a manner that prevents them from being filtered easily or settling rapidly.
- Milk
- Fog
- Mayonnaise
Tyndall Effect
The scatering of light passing through a transparent medium.
- Exhibited by colloids and some suspensions
- Not exhibited by solutions
Techniques to separating solutions
Distillation, crystalization, chromatography
