Show:
intro to matter
solids liquids and gases
elements and the periodic table
atoms+bonding
chemical reactions
100

That are able to be observed without being changed into a different property.

A substance can be classified by its physical properties which are properties that 

100

Solid 

 A substance with a definite shape and definite volume is a...


100
protons
the atomic number is determined by
100

ion

When an atom loses or gains electrons, it becomes a(n) 


100
burning wood
what is a good example of chemical change
200

Four methods that can be used to separate mixtures are


Four methods that can be used to separate mixtures are


200

The particles spread and leave each other


What happens when the gas particles in an inflated ball when it gets a hole? Why?


200
periods
the rows in the periodic table are called
200
it becomes a positive 

When an atom loses an electron it 


200
gas bubble 
what is a god example of a chemical reaction
300

mass/volume=density


The density of a substance is calculated by 


300

Evaporation


A puddle dries up by the process of 


300
alkali metals
the group that is the most reactive 
300
ionic bonds 

The metal atoms in iron are held together by


300
change the coefficients
how can you balance a chemical reaction
400

Physical properties.


 The abilities to dissolve in water and to conduct electric current are examples of...


400

The pressure increases 

Explain why placing a dented table-tennis ball in boiling water is one way to remove the dent in the ball(assume the ball has no holes) 

400
radioactive 
unstable atomic nuclei release fast moving particles and energy are
400
polar bond

A covalent bond in which electrons are shared equally is called a 


400
maintain a constant temperature 
what is a good way to increase the reaction rate
500

Law of exothermic change law of conservation of mass


 The fact that matter is neither created nor destroyed in any chemical or physical change is called the...


500

Liquid water

A student is studying water. The sample has a definite volume, but no definite shape. Which state of matter is the student examining?


500
tracer
a radioactive isotope that can be followed through a chemical reaction or industriall is called a 
500

Neutral groups of atoms formed by by covalent bonds

The formulas N2 H2O and CO2 all represent molecules which are defined as 


500
the rate of reactions increases 
in general what happens when you increase the temperature of a reaction