reporting category #1 matter & energy. physical & chemical properties physical properties...
TRANSCRIPT
Reporting Category #1
Matter & Energy
Physical & Chemical Properties
• Physical properties are properties that do not change the chemical nature of matter.– Shape, smell, and density– Phase changes: water turning to water
vapor
Physical & Chemical Properties
• Chemical properties are properties that do change the chemical nature of matter.– Color change, heat of combustion,
reactivity with water and pH.– Iron Rusting
• Any substance that contains only one kind of an atom is known as an element.
• Each element is represented by a unique symbol. The symbol for each element can be found on the periodic table of elements.
• Ex: aluminum (Al), hydrogen (H), calcium (Ca) , mercury
(Hg).
Physical & Chemical Properties
• 3 Categories in the Periodic Table• Metals
• Nonmetals
• Metalloids
Categories
Metals
• Physical Properties of Metals:• Luster (shininess) • Good conductors of heat and electricity • Chemical Properties of Metals:• Easily lose electrons • Corrode easily. Corrosion is a gradual
wearing away. (Example: silver tarnishing and iron rusting)
Nonmetals
• Physical Properties of Nonmetals:
• No luster (dull appearance) • Poor conductor of heat and electricity • Low melting point
Metalloids
• Physical Properties of Metalloids:
• Solids • Can be shiny or dull • Conduct heat and electricity better
than nonmetals but not as well as metals
Physical & Chemical Properties
• A compound is a substance formed when two or more elements are chemically joined.
• Water, salt, and sugar are examples of compounds.
• Letters, numbers, and symbols are used to represent elements and the number of elements in each compound.
• Example: alcohol (C2H5OH), water (H2O),
Mixtures
• Mixtures• Homogeneous mixtures are
ones that have consistent properties. Think of them like a blended shake, which has the fruit cut so small and mixed up so that the shake has a specific consistency.
• Heterogeneous mixtures have inconsistent and non-uniform composition, like a salad- it’s easy to see and separate the different vegetables.
Atoms
• Atom–Tiny particles that compose most forms of matter
–Simplest unit of an element
–Smallest unit of matter
Atoms
Atoms
• Atoms are made up of three subatomic particles:– Protons – positive charge located in the
nucleus– Electrons – negative charge orbits
around the nucleus– Neutrons – neutral charge located in the
nucleus
APE MAN
A=P=E M-A=N
A = Atomic mass#P = # of ProtonsE = # of Electrons
M = Mass #A = Atomic #N = # of Neutrons
Reading the Periodic Table
Atomic Number SymbolAtomic Mass Name
Chemical Equation
2 H2O2 2 H2O + O2
Word Bank
Coefficient
Coefficient Product Reactant Subscript Yield
Compound vs. Element
3C6H12O6 C = _____ H = _____ O =
_____
Compound Element# of Atoms
Balanced or Unbalanced
Na + O2 Na2O
Na =
O =
Na =
O =
Organic or Inorganic
Na + O2 Na2O
Na =
O =
Na =
O =
Matter & Energy
Matter & Energy