Download Sem 1 Final

Semester 1 Final Review
Have your periodic table and
scientific calculator ready!
Temperature
• What is the lowest temperature
known? Give your answer in both
Kelvin and Celcius.
• 0 Kelvin
• 273 oC
Temperature
• What is the special name given to
the lowest temperature from the
previous slide?
• Absolute Zero
Temperature
• Which temperature is colder 172 K or
-75oC?
• 172 Kelvin
Subatomic particles
• Give the number of protons,
neutrons, and electrons in the atom
32
symbolized by 15
P
• protons – 15
• electrons – 15
• neutrons – 17
Atomic number
• What does the atomic number of an
element tell us about the nucleus?
• Number of protons
Mass Number
• What does the mass number tell us
about an atom?
• The number of protons PLUS the
number of neutrons in the nucleus
Subatomic particles
• Which subatomic particles is the
most responsible for the chemical
properties of the element?
• Electrons
Isotopes
• In two isotopes of the same element,
which of the following would be the
same and which would be different?
– Atomic number
– Number of protons
– Number of neutrons
– Number of electrons
– Element symbol
– Atomic mass
Same
Same
Different
Same
Same
Different
Isotopes
• What is the given
information for the isotope
of Carbon-14
–
–
–
–
–
–
Atomic number
Number of protons
Number of neutrons
Number of electrons
Element symbol
Atomic mass
•
•
•
•
•
•
6
6
8
6
C
14
Valence electrons
• Where do we find the number of valence
electrons for an element?
• Its group number
• Where in the atom are valence electrons
found?
• Highest occupied energy level
Periodic Table
• What is the name of the yellow
region?
Metals
Many groups have special
names…what are they?
Alkali Metals
Many groups have special
names…what are they?
Alkaline
Earth Metals
Many groups have special
names…what are they?
Halogens
Many groups have special
names…what are they?
Noble Gases
Many groups have special
names…what are they?
Transition
Metals
Periodic Table
• What is the name of the green
region?
Periodic Table
• What is the name of the pink region?
Ions
• How are ions formed?
• Gaining or losing electrons
Cations
• Cations are produced when a neutral
atom….
• loses electrons;
• thus causing cations to have a
positive
______________
charge?
Cations
• Where are cations found on the
periodic table?
• Metals: Group 1A,2A,3A, & transition
metals.
Anions
• Anions are produced when a neutral
atom….
• gains electrons;
• thus causing anions to have a
negative
______________
charge?
Anions
• Where are anions found on the
periodic table?
• Nonmetals: Group 5A,6A,& 7A
Units of measure
What is the SI unit of measure for:
•
•
•
•
•
Volume
Mass
Length
Temperature
# of particles in a
substance
•
•
•
•
•
Liter
Kilogram
Meter
Kelvin
Mole
The Mole
• What is a mole? How much
does it represent?
• A unit of measure defined by the
number of carbon atoms in exactly
12.01 grams of carbon.
• 6.02 x 1023 particles/atoms/molecules
Atoms
• If you have 2.13 x 1024 atoms of Au,
how many moles of Au do you have?
• 3.54 mol Au
Atoms
• How many atoms are there in 1.28
mol of calcium?
• 7.71 x 1023 atoms Ca
Balance the following:
2
• 2_AgNO3 + _Cu  _Cu(NO3)2 + _Ag
2
2 2O  _H2 + _NaOH
• 2_Na + _H
2C3H8 + 7O2  6CO + 8H2O
• Calculate the number of moles of
CO produced when 1.2 mol of H2O is
produced in the incomplete
combustion reaction above.
• 0.9 mol CO
• How many grams of CO are
produced?
25 g CO
C3H8 + 5O2  3CO2 + 4H2O
• How many liters of O2 are needed to
react with C3H8 to produce 2.0 liters
of H2O?
• 2.5 liters O2
C3H8 + 5O2  3CO2 + 4H2O
• How many grams of propane are
needed to react with an excess of O2
to produce 20 g CO2
20g CO2
mol C3H8 44.11g C3H8
mol CO2



44.01g CO2 3 mol CO2
mol C3H8
• 6.7g C3H8
Be sure to…
• Look over your notes from the last
couple days of class.
• Remember to read the questions
completely AND use units when
solving the “math” questions.
• Be confident and relax. You know
most of this and YOU CAN DO IT!