Reporting Category #1 Matter & Energy. Physical & Chemical Properties Physical properties are properties that do not change the chemical nature of matter.

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