Classification of matter Flashcards Preview

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Flashcards in Classification of matter Deck (20):
1

What are the properties of materials?

Strength
Brittleness
Ductility
Malleability
Magnetic/ non-magnetic
Density
Melting and boiling point
Thermal and electrical conductivity

2

Def of a mixture

A combination of two or more substances in which the substances retain their own chemical properties 🍷

3

Homogeneous mixture(solution)
Name 7 types:

A mixture in which the composition in the same throughout
1. Gaseous πŸ’¨
2. Liquid 🍷
3. Solid πŸ₯„
4. Liquid and gas 🌫
5. Gas in liquid πŸ’§
6. Solid in liquid β˜•οΈ
7. Liquid in solid

4

Heterogeneous mixtures?
7 types:

Composition is not uniform.
1. Suspension 🍸
2. Emulsion🍢
3. Gel 🍦
4. Fog 🌁
5. Smoke πŸŒ‹
6. Foam 🍻
7. Solid foam🍞

5

7 physical separating methods?

Filtration
Chromatography
Sorting
Magnetic separation
Distillation
Evaporation
Separating funnel

6

What is a pure substance?

Only one type- chemically bonded at a fixed ratio.

7

Criteria for purity?

Constant melting and boiling point
One dot in a chromatogram

8

Atom

Smallest particle retaining the same chemical properties

9

Compound?

2 or more elements combined in fixed proportions. Only separated by chemical means.🌠

10

Unique formula tells us:

Type of elements
Number of atoms

11

Difference between a molecule and a crystal?

Molecule- covalent bond(2 non metals)

Crystal- ionic bond(metal + non-metal)

12

8 properties of metals?

1. Solids (exc. Hg)
2. High melting points
3. Shiny
4. Malleable and ductile
5. Conduct electricity
6. Conduct heat
7. Strong
8. Grey

13

Name the semi metals and 3 properties?

Ge; Si ; Te ;Sb ;B; As; Po
1. Non Metallic properties
2. Metallic appearance but brittle
3. Si and Ge are semi conductors

14

8 properties of non metals?

1. Solid/gas excluding Br
2. Dull and brittle
3. Network/ molecular structures
4. High m +B points
5. Poor conductor of ⚑️(exc. graphite)
6. Poor conductors of heat (exc. diamond and graphite)
7. Low density
8. Vary in color

15

Conductors?

Material which allows current to pass through it easily.

16

Semi conductor?

Elements that normally cannot conduct ⚑️ but can have conductivity improved by raising temp or adding certain impurities

17

Insulator?

Materials which do not allow current to pass through?

18

Heat?

Energy traveling from an object with a higher temp to an object with a lower temp.

19

3 ferromagnetic materials?

Ni; Fe; Co

20

Alloy?

Mixture of different metals / non metals