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ch.1
Ch.2
Ch.3
Ch.4
ch.5
100
which of the following is an example of a chemical proprty?
flammability
100
Which of the following correctly describes a Liquid? 
A substance that is closely packed together with no arrangement  
100

The rows of the periodic table are called 

Groups or families

100
An electron dot diagram shows an atom's number of...?
Valence eclectrons
100
What increases the rate of reaction?
Increase the concentration of the reactants
200
a substance can be classified by its physical properties,which are properties that .....
can be observed without changing it into another object.
200
A student is studying water.The sample has a definite volume, but with a shape of a square which state of matter is the student examining  
Solid ice 
200

The atomic number of an element determined by the number of  

protons

200
When an atom loses or gains electrons it becomes an
ion
200
What is an example of a chemical reaction?
Change in temperature
300
which of the following is a substance table salt , seawater ,sand ?
table salt 
300
According to Boyle's law, the volume of a gas increases when its 
pressure decreases 
300
Two isotopes of an element have the same number of 
protons and electrons 
300
A covalent bond in which electrons are shared equally is called a
Non polar bond
300
What happens when you increase the temperature of a reaction?
The rate of the reaction increases
400
what is the SI unit of mass?
kilogram
400
According to Charles's law, when the temperature of a gas is increased at a constant pressure, its volume    
Increase 
400
who constructed the first periodic table 
Dmitri Mendeleev
400
The metal atoms in iron are held together by
Metallic bonds
400
How can you balance a chemical equation?
Change the products
500
is burning ,rusting or freezing a physical change?
freezing 
500
Which of the following changes of state is exothermic 
Freezing 
500
why arent atomic masses whole numbers 
there weighed by its naturally occurring isotopes 
500
When an atom loses an electron, it becomes a?
positive ion
500
Which of the following results in a chemical change in matter?
Burning wood