Classification Of Matter

Question 1

What is classification of matter?

Answer 1

Classification of matter refers to the way in which matter is organized based on its composition and properties

Question 2

What are the two types of classification of matter?

Answer 2

There are pure substance and mixtures

Question 3

What is a pure substance?

Answer 3

Pure substances are substances that are made up of only one kind of particle and have a fixed or constant structure

Question 4

How is a pure substance classified?

Answer 4

Pure substance is classified as elements and compounds

Question 5

A element is a pure substance or a mixture?

Answer 5

An element is a pure substance as it cannot be broken down or transformed into a new substance even by using some physical or chemical means

Question 6

What are some examples of elements?

Answer 6

Elements are mostly metals, non-metals or metalloids.

Question 7

What is a compound and is a pure substance or a mixture?

Answer 7

Compounds are also pure substances when two or more elements are combined chemically. However, these substances can be broken down into separate elements by chemical methods.

Question 8

Characteristics and properties of pure substances

Answer 8

• Pure substances are made of a single type of molecule or atom, so they are mostly homogeneous
• Pure substances are uniform and constant
• The substances have fixed boiling and melting points.

Question 9

Characteristics and properties of mixtures

Answer 9

• It does not have any specific properties, the properties of the mixture are a result of the average properties of all the constituents.
• It is formed as a result of a physical change.
• They have a variable composition.
• Their melting and boiling points differ

Question 10

Methods to separate mixtures

Answer 10

• evaporation, the solution is heated until the organic solvent evaporates (turns into gas) and leaves behind the solid residue
• distillation, two or more pure liquids, liquid mixture is evaporated, condensed and the isolated. The mixture is heated and a component is evaporated, the vapor moves through a condenser and is collected in a liquid state.
• filtration: separates a liquid from an insoluble solid. Used to remove solid particles from the liquid. Use filtering paper or other materials