Chemical%20

1
Chemical physical properties

• 8th Grade Science

2

• Everything is made of chemicals. There are 92
  natural chemicals or elements. They are arranged
  on the periodic table. Each element is composed
  of extremely small particals called atoms.

3

• All atoms of a given element are identical. Atoms
  of different elements have different properties.
  Each chemical has predictable properties that
  distinguish or separate it from other chemicals.

4

• The properties of matter can be grouped into two
  categories physical and chemical properties.

5
Physical properties... Describe what a substance
is like or its ability to change in some way but
it still stays the same molecule.

• Examples
• color
• density
• odor
• melting point
• boiling point
• hardness

6

• What are some physical properties of vinegar?

• smell
• its a liquid
• clear
• taste bitter

7
Chemical properties...

• describe an object/substances ability to change
  into something new. We use these properties to
  distinguish chemicals from one another.

Ex Flammability Reactivity
8

• Some examples of chemical properties are...
• paper burns
• iron rusts
• silver doesnt react w/water
• nitrogen doesnt burn

9

• In each of these, the substances chemical
  property is its tendency to
• react
• tarnish
• corrode
• Explode
• (bubbles,
• Smell)

10
Physical vs. chemical properties

• Wood

• Physical Property
• grainy texture
• Chemical Property
• Flammable

11
PHYSICAL VS. CHEMICAL PROPERTIES
Baking Soda

• Physical Property
• white powder
• Chemical Property
• reacts with vinegar to produce bubbles

12
Chemical vs. physical properties
Iron

• Physical Property
• Malleable (able to be shaped)
• Chemical Property
• Reacts with oxygen to form rust