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Properties of matter
Density, Elements v Compounds, Physical v Chemical Changes
Term | Definition |
---|---|
physical characteristics | characteristics observed or measured. does Not change the identity of the substance |
chemical characteristics | ability to change into a NEW substance with different properties |
production of gas | Bubbles, Foaming, Fizzing, Smoke, Odor |
color change | A different color appears. *Not always chemical |
formation of percipitiate | Cloudiness, foggy, Solid at the bottom |
change in heat or light energy | Temperature Increase, Temperature Decrease, Spark, Explosion, Glowing |
element | PURE Substance, One kind of atom, Same "shape" |
element symbol | shown by 1-2 letters. 1st letter is always Capital, 2nd is lowercase. Ex: Na |
compound | More than one kind of atom. Different "shapes" Ex: H2O |
subscript | tells you how many atoms of each element the compound has. |
no subscript | only has one atom of that element |
metals | to the Left of the zigzag. Solid at room temp. (except Mercury). Good conductors. Metallic. Ductile. Malleable |
metalloids | on the zigzag. Share properties of metals and nonmetals. Ex: B, Si, Ge, As, Sb, Te, Po |
nonmetals | to the Right of the zigzag. Solid, liquid or gas at room temp. Poor conductors. Brittle. Not metallic. |
metallic | Shiny |
ductile | ability to be pulled into wire |
malleable | ability to be hammered into sheet |