Flashcards in Classification of matter Deck (20):
What are the properties of materials?
Melting and boiling point
Thermal and electrical conductivity
Def of a mixture
A combination of two or more substances in which the substances retain their own chemical properties 🍷
Name 7 types:
A mixture in which the composition in the same throughout
1. Gaseous 💨
2. Liquid 🍷
3. Solid 🥄
4. Liquid and gas 🌫
5. Gas in liquid 💧
6. Solid in liquid ☕️
7. Liquid in solid
Composition is not uniform.
1. Suspension 🍸
3. Gel 🍦
4. Fog 🌁
5. Smoke 🌋
6. Foam 🍻
7. Solid foam🍞
7 physical separating methods?
What is a pure substance?
Only one type- chemically bonded at a fixed ratio.
Criteria for purity?
Constant melting and boiling point
One dot in a chromatogram
Smallest particle retaining the same chemical properties
2 or more elements combined in fixed proportions. Only separated by chemical means.🌠
Unique formula tells us:
Type of elements
Number of atoms
Difference between a molecule and a crystal?
Molecule- covalent bond(2 non metals)
Crystal- ionic bond(metal + non-metal)
8 properties of metals?
1. Solids (exc. Hg)
2. High melting points
4. Malleable and ductile
5. Conduct electricity
6. Conduct heat
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
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
Material which allows current to pass through it easily.
Elements that normally cannot conduct ⚡️ but can have conductivity improved by raising temp or adding certain impurities
Materials which do not allow current to pass through?
Energy traveling from an object with a higher temp to an object with a lower temp.
3 ferromagnetic materials?
Ni; Fe; Co