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Prentice   Hall   EARTH SCIENCE Tarbuck   Lutgens  
Chapter   2 Minerals
2.1   Matter    Elements  are the b asic building blocks  of minerals.     Over 100 elements are known.   Elements and the Periodic Table
2.1  Matter    Smallest particles of matter      Have all the characteristics of an element ,[object Object],   The nucleus   is the  central part of an atom and contains ,[object Object],Atoms
2.1   Matter    Energy levels , or  shells ,[object Object],[object Object],   The  atomic number  is the number of protons in the nucleus of an atom. Atoms
Model of an Atom
2.1   Matter    Many isotopes are radioactive and emit energy and particles.    Isotopes  of an element have the same number of protons but varying numbers of neutrons.      Have different mass numbers: the sum of the neutrons plus protons      The  mass number  is the number of neutrons and protons in the nucleus of an atom. Isotopes
2.1  Matter ,[object Object],   When an atom’s outermost energy level does not contain the maximum number of electrons, the atom is likely to form a  chemical bond  with one or more atoms. ,[object Object],Why Atoms Bond
2.1  Matter 1.  Ionic bonds  form between positive and negative ions. 2.  Covalent bonds  form when atoms share electrons. 3.  Metallic bonds  form when metal ions share electrons. Types of Chemical Bonds
2.2   Minerals 1. Naturally occurring 2. Solid substance 3. Orderly crystalline structure 4. Definite chemical composition 5. Generally considered inorganic Definition of a Mineral
2.2  Minerals 1. Crystallization from magma  2. Precipitation 3. Pressure and temperature 4. Hydrothermal solutions How Minerals Form
Minerals Formed as a Result of Crystallization of Magma
2.2   Minerals    Can be classified based on their composition 1.  Silicates ,[object Object],Mineral Groups
The Silicon-Oxygen Tetrahedron
Silicon-Oxygen Chains, Sheets,  and Three-Dimensional Networks
2.2   Minerals 2. Carbonates ,[object Object],3. Oxides ,[object Object],Mineral Groups
2.2   Minerals 4. Sulfates and Sulfides ,[object Object],5. Halides ,[object Object],6. Native elements ,[object Object],Mineral Groups
Sulfides
Native Copper
2.3   Properties of Minerals    Small amounts of different elements can give the same mineral different colors. Color
2.3   Properties of Minerals    Streak  is the color of a mineral in its powdered form. Streak
2.3   Properties of Minerals    Luster  is used to describe how light is reflected from the surface of a mineral. Luster
Pyrite (Fool’s Gold) Displays  Metallic Luster.
2.3  Properties of Minerals    Crystal form  is the visible expression  of a mineral’s internal arrangement of atoms. Crystal Form
Quartz Often Exhibits  Good Crystal Form.
2.3  Properties of Minerals    Hardness  is a measure of the resistance of a mineral to being scratched.    Mohs scale  consists of 10 minerals arranged from 10 (hardest) to 1 (softest). Hardness
Mohs Scale of Hardness
2.3   Properties of Minerals    Cleavage  is the tendency of a mineral to cleave, or break, along flat, even surfaces. Cleavage
Mica Has Cleavage in One Direction
2.3   Properties of Minerals    Minerals that do not show cleavage when broken are said to fracture.    Fracture — the uneven breakage of  a mineral Fracture
Conchoidal Fracture
2.3  Properties of Minerals    Density  is a property of all matter that  is the ratio of an object’s mass to its volume. Density
2.3   Properties of Minerals    Some minerals can be recognized by other distinctive properties. Distinctive Properties of Minerals

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02.minerals

  • 1. Prentice Hall EARTH SCIENCE Tarbuck Lutgens 
  • 2. Chapter 2 Minerals
  • 3. 2.1 Matter  Elements are the b asic building blocks of minerals.  Over 100 elements are known. Elements and the Periodic Table
  • 4.
  • 5.
  • 6. Model of an Atom
  • 7. 2.1 Matter  Many isotopes are radioactive and emit energy and particles.  Isotopes of an element have the same number of protons but varying numbers of neutrons.  Have different mass numbers: the sum of the neutrons plus protons  The mass number is the number of neutrons and protons in the nucleus of an atom. Isotopes
  • 8.
  • 9. 2.1 Matter 1. Ionic bonds form between positive and negative ions. 2. Covalent bonds form when atoms share electrons. 3. Metallic bonds form when metal ions share electrons. Types of Chemical Bonds
  • 10. 2.2 Minerals 1. Naturally occurring 2. Solid substance 3. Orderly crystalline structure 4. Definite chemical composition 5. Generally considered inorganic Definition of a Mineral
  • 11. 2.2 Minerals 1. Crystallization from magma 2. Precipitation 3. Pressure and temperature 4. Hydrothermal solutions How Minerals Form
  • 12. Minerals Formed as a Result of Crystallization of Magma
  • 13.
  • 15. Silicon-Oxygen Chains, Sheets, and Three-Dimensional Networks
  • 16.
  • 17.
  • 20. 2.3 Properties of Minerals  Small amounts of different elements can give the same mineral different colors. Color
  • 21. 2.3 Properties of Minerals  Streak is the color of a mineral in its powdered form. Streak
  • 22. 2.3 Properties of Minerals  Luster is used to describe how light is reflected from the surface of a mineral. Luster
  • 23. Pyrite (Fool’s Gold) Displays Metallic Luster.
  • 24. 2.3 Properties of Minerals  Crystal form is the visible expression of a mineral’s internal arrangement of atoms. Crystal Form
  • 25. Quartz Often Exhibits Good Crystal Form.
  • 26. 2.3 Properties of Minerals  Hardness is a measure of the resistance of a mineral to being scratched.  Mohs scale consists of 10 minerals arranged from 10 (hardest) to 1 (softest). Hardness
  • 27. Mohs Scale of Hardness
  • 28. 2.3 Properties of Minerals  Cleavage is the tendency of a mineral to cleave, or break, along flat, even surfaces. Cleavage
  • 29. Mica Has Cleavage in One Direction
  • 30. 2.3 Properties of Minerals  Minerals that do not show cleavage when broken are said to fracture.  Fracture — the uneven breakage of a mineral Fracture
  • 32. 2.3 Properties of Minerals  Density is a property of all matter that is the ratio of an object’s mass to its volume. Density
  • 33. 2.3 Properties of Minerals  Some minerals can be recognized by other distinctive properties. Distinctive Properties of Minerals