Element Flashcards
What is a element
A element is a pure substance that cannot be broken down into simpler substances by using a ordinary physical or chemical properties.
Whet is a compound
A compound is a substance that is formed when two or more different types of elements which an chemically bond together in a fixed proportion and in away that their properties have changed .
An impure substance.
A mixture E impure substance contain 2 or more different components.
What is a pure substance
Pure substance composed of a single types material only.there are two general characteristics
Its Composition and properties are fixed and constant. Melting point, boiling point will be fixed.
The components parts cannot be separated by physical processes
Comparing compounds and mixture
Pure substance cannot be separated by physical means, physical properties are different from the elements from which they are made.
Mixtures composition is variable can be separated by physical mean.
Physical properties eg: colour and density are the average of the substance in the mixture.
What is a solution
A solution is a homogenous mixture which two or more substances. One substance is a liquid
What is an solvent
A solvent is a substance that is dissolve in a solvent.
The solvent can be solid, liquid and gas.
What is a solute
A solute is a substance dissolve in a solvent. The solute can be a solid, liquid and gas.
- solution
The particle so small that they cannot be seen.
They are generally transparent. Light can be transmitted through them.
The particles cannot be separated by filtration and do not separate out by letting the mixture stand for a while.
What is a suspension
A suspension is a mixture of small particles dispersed in other substance. The same particle settle and standing.
The particles are large enough to be visible.
They are opaque not transparent to light. Light is scattered by them.
The particles can be dispersed by filtration the particles undergo sedimentation they do not settle on standing.
What is a collide
Colloids are not large enough to be visible. They are large than a solution but smaller than suspension. 1 and 1000 diameter.
They are oeqaue not transparent to light. Light scatter them.
The particles are too small to be separated by filtration.
The particles do not undergo sedimentation. They do not settle and standing.
Mixture
A mixture that is homogeneous is uniformed. We cannot distinguish each component from each other
Heterogeneous
Heterogeneous is a non uniformed mixture. It is impossible to distinguish each component
