Matter and Energy
By: Kyla, Mauri, and Nicole
Metals, Nonmetals, and Metalloids
Three main element groups:
3. MatalloidsPhysical Properties:
Metals- Good electrical and heat conductors, malleable, ductile, solid at room temperature.
Nonmetals- poor conductors of heat and electricity, non-ductile brittle, solids liquids or gases at room temperature.
Metalloids- Shiny or dull, conductivity of heat and electricity, solid at room temperature, ductile, and malleable.
Definition: The degree of compactness of a substanceDensity Formula= m/v
~It's not the weight of the object, but it's the density that determines whether an object will sink or float in water.
Example: Mass is 55 grams and volume is 5 cubic centimeters. Density= 11 grams
Physical Properties: luster, color, streak, cleavage, and hardness= identify minerals.
How To Test
Hardness: by seeing how easy it is to scratch a mineral.
Color: look at the color of the streak.
Luster: how it reflects light and can be metallic, pearly, glassy, silky, or dull.
Streak: rub the mineral across a piece of tile.
The hardest mineral known is the diamond.
The streak is more reliable than looking at the mineral because the outside of a rock can look different than the streak.