Download Ch 2.1 and 2.2 Review

Atoms and Molecules
1. What are the three subatomic particles that make up an
atom?
2.
Which two subatomic particles make up the nucleus?
3.
Which particles are negatively charged?
Where can you find these particles?
4.
What are the two types of bonds?
5.
Which one shares electrons between elements?
6.
Which one transfers electrons from one element to
another?
Water
1.
What is the formula for water?
2.
Sketch a water molecule.
3.
Is water a polar molecule or a non polar molecule?
4.
What does this mean?
5.
Correctly label the water molecule you sketched for
number two to show this property.
6.
What is the difference between cohesion and adhesion?
7.
Which of these properties helps to create surface
tension?
Solutions and Suspensions
1.
What is a mixture?
2.
There are two different types of mixtures, what are
they?
3.
What is the difference between these two mixtures?
4.
What are the two parts to a solution?
5.
Water is often called the universal solvent, what does
this mean?
6.
Salt water is an example of a ____________.
7.
Sand and water is an example of a _______________.
pH Scale
1.
The pH scale measure the amount of ________ ions in a
solution.
2.
The number _______ on the scale is neutral.
3.
Below this number is __________. This means that
there is a __________ concentration of H+ ions.The
closer to zero you get the more __________ your
solution becomes.
4.
Above this number is __________. This means that
there is a __________ concentration of H+ ions. The
closer to 14 you get the more __________ your solution
becomes.
5.
Water has a pH of ______. So it is ___________.
6.
Ammonia has a pH of _________. So it is _________.
7.
Lemon Juice has a pH of ________. So it is ________.
Atoms and Molecules
1. What are the three subatomic particles that make up an
atom? Protons, Neutrons, and Electrons
2.
Which two subatomic particles make up the nucleus?
Protons and Neutrons
3.
Which particles are negatively charged? Electrons
Where can you find these particles?
Electron cloud (orbitals)
4.
What are the two types of bonds?
Ionic and covalent
5.
Which one shares electrons between elements? Covalent
6.
Which one transfers electrons from one element to
another? Ionic
7.
What does the atomic number and atomic mass tell you?
Atomic number = # of protons (# of electrons)
Atomic mass = # of protons and neutrons
8.
How do you determine the number of neutrons?
Atomic mass – atomic number = # of neutrons
Water
1.
What is the formula for water? H2O
2.
Sketch a water molecule.
3.
Is water a polar molecule or a non polar molecule?
Water is a polar molecule. (Oil is an example of a
nonpolar molecule)
4.
What does this mean? It has a positive and negative end
(Hydrogen end is positive and Oxygen end is negative)
5.
Correctly label the water molecule you sketched for
number two to show this property. See Above
6.
What is the difference between cohesion and adhesion?
Cohesion – Water is attracted to itself. Surface tension
is an example, the water molecules attached to each
other make a layer on the surface.
Adhesion – Water molecules are attracted to other types
of molecules ex) water and glass
7.
Which of these properties helps to create surface
tension? Cohesion
Solutions and Suspensions
1.
What is a mixture? More than one substance mixed
together to make a homogenous or heterogeneous liquid.
2.
There are two different types of mixtures, what are
they? Solution and suspension
3.
What is the difference between these two mixtures?
Solution is homogeneous (evenly distributed to look like
one substance). Suspension is heterogeneous (particles do
not evenly mix and can be seen in the liquid.
4.
What are the two parts to a solution? Solvent and
Solute
5.
Water is often called the universal solvent, what does
this mean? It will mix with almost any other substance
6.
Salt water is an example of a _Solution_.
7.
Sand and water is an example of a __Suspension__.
pH Scale
1.
The pH scale measure the amount of _H+ (hydrogen)_
ions in a solution.
2.
The number _7_ on the scale is neutral.
3.
Below this number is _acid_. This means that there is a
__higher__ concentration of H+ ions. The closer to zero
you get the more _acidic (stronger)_ your solution
becomes.
4.
Above this number is _basic_. This means that there is
a _lower_ concentration of H+ ions. The closer to 14 you
get the more _basic (stronger)_ your solution becomes.
5.
Water has a pH of _7_. So it is _neutral_.
6.
Ammonia has a pH of _9_. So it is _a base_.
7.
Lemon Juice has a pH of _2_. So it is _an acid_.