Chemistry, Earth History, infectious Diseases,& Lithosphere
Chemistry-8.P.1- Understand the properties of matter and changes that occur when matter interacts in an open and closed container
Physical and Chemical Properties:
odor,mass,density,volume,state, & color.
Does not formed a new substance
These properties can only be observed during a chemical reaction.
Describes matter based on its ability to change into new matter with different properties.
A new color appears, heat, sound, or light is given off, bubbles of gas are formed, a solid material forms into a liquid, or if the change is difficult or impossible to reverse.
The periodic table is a list of all the known elements. Its organized by increasing atomic number. The 2 main groups in the periodic table are metals and non-metals.The ones on the far right side consist of non-metals. The elements in the middle are called transition elements because they change from metallic to non-metallic. Vertical columns are called groups or families and horizontal rows are called periods. The elements in the first period or row all have one shell. Th elements in row two all have two shells. The elements in period 3 have 3 shells and so fourth and so fourth.
Compound-Substances formed when 2 or more elements chemically combined.Ex. H2O, CO2, NcCl.
Matter- Anything the has mass & takes up space. Ex. A brick
Solution-A substance made as a result of mixing a solid and a liquid and the solid dissolves. Ex.Syrup
Atom-The basic building block of matter. Ex. Neon
Mixture- Combination of two or more substances. Ex. Salad.
Element- Building blocks of matter made of atoms. Ex. Gold.
Molecule- 2 or more atoms joined together chemically.
Heterogeneous-Can see the parts and can be put back. Ex. Salad
Homogeneous- Can't see the parts and cannot be separated. Ex. Gold