notes:
mohs hardness scale:based on the ability of one natural sample of matter to scratch another.the samples used by this scale are all minerals. The scale goes from 1-10 , 1 is the softes and 10 on this scale is the hardest.2.1. matter : anything that is considered to have mass and volume.
-elements
-atoms wich are units of matter that consist of a dense centeral surrounded by a cloud of negatively charged electrons.
-isotopes share the same number of protons but not the same # neutrons.
-compounds are combination of two or more elements.
-bondings such as:
>ionic bonds which transfer
>covalent bonds wich share electrons
>metallic bonds creating metals.
2.2. minerals: natrually occuring substances
-5 descriptions of a mineral
>solid >inorganic >naturally orcurring
>definate chemical composition
>definate crystalline structure
-4 procceses
>crystalization ,presipitaion , hydrothermal
-common mineral groups
>silicons , sulfates , oxides , carbonates , and halides
2.3 properties of minerals
-color , streak , luster , crystal form , hardness , cleavage or fracture and density .
-density = m/v
