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- characteristics: -Naturally occurring
- - solid substance
- - orderly crystalline structure
- - well-defined chemical composition
- -generally inorganic
formed by natural geologic processes. Not synthetic
minerals need to be solid within temperature ranges normally experienced at earths surfaces.
*Orderly crystalline structure
means their atoms are arranged in a orderly repetitive manner.
*Well-defined chemical composition
means that chemical composition of a mineral may vary, but has to be wihin a certain limit or well defined limit.
inorganic crystalline solids, such as table salt is found naturally on ground.
are electrons located on the outermost shell. Interact with other atoms to form chemical bonds
number of protons in the nucleus of an atom, it determines its chemical nature
variety of elements joined together to form something
Atoms tend to gain, lose, or share electrons until they are surrounded by 8 valence electrons
is the transfer or sharing of electrons that allows atoms to attain a full valence shell of electrons.
three types: Ionic, covalent, hydro
is when valence electrons are transferred between the elements to form ions
is when electrons SHARE between the atoms
Positive ions: Cations
Negative Ions: Anions
- Atoms that lose electrons are Cations
- Atoms that gain electrons are Anions
oppositely charges ions are strongly attracted to one another.
is total number of protons and neutrons in a atom
are atoms with same protons but different amount of neutrons
carbon 12, carbon 13, carbon 14
Physical properties of minerals: Optical properties
Luster, the ability to trasnmit light, color, and streak are most frequnetly used for mineral ID
appearance or quality of light refelcted from the surface of a mineral
Metallic or nonmetallic
#Ability to trasnmit light
Opaque: no light is permitted
Translucent: light but no image
Transparent: both light and image are permitted
it can be misleading in identifying minerals. There are numerous of rocks that have different colors.
is when a rock or mineral is rubbed on a streak plate, leaving color powdered mineral behind.
helps distinguish between metallic luster or nonmetallic luster
describes mienrals toughness, or its resistance to breaking or deforming.
measure of the resistance of a mineral to abrasion or scratching.
10 objects. diamond is the hardest.
tendency of a mineral to break along planes of weak bonding
not all minerals have cleavage
when some minerals fracture they create uneven surfaces or smoothed curves.
it is unitless representing the ratio of a mineral weight to the weight of an equal volume of water