Monday, September 28
– Please take out your review packet
– Remember that today is the last
day I’ll check homework!!
Quizzes back
– Out of 32
– Quiz corrections due tomorrow
– On a separate sheet of paper, complete
the following
– Explain what is wrong about your original
answer
– Give the correct answer
– Explain why the correct answer is correct
– Full points back (100% in formative!)
Define neutron
– How do you figure out how many
neutrons an atom has?
Define proton
– How do you figure out how many
protons an atom has?
Define electron
– How do you figure out how many
electrons an atom has?
How many…
– Protons are in a lithium atom?
– Electrons are in a nitrogen atom?
– Neutrons are in a typical oxygen
atom?
– Neutrons are in a lead atom with a
mass of 208 AMU?
How is a compound different
from a mixture?
Classify each of the following as
element, compound, or mixture.
– Soda
– N2
– Carbon dioxide
– Na2CO3
– Air
– Dirt
– Silicon
Pippy Pipette and Betty Bottlebrush burn
copper oxide (CuO) in their AP chemistry
class. They begin with 6.5 grams of copper
oxide powder. They end up with 4.2 grams of
copper.
What is the theoretical mass percent of
copper in copper oxide?
What should be the final mass of copper
formed from this mass of copper oxide?
Pippy and Betty get 4.5 grams of copper
oxide. Calculate their percent error.
What is an isotope?
Calculate the mass by percent for
each element in the following
atoms.
–Ca(OH)2
–C6H12O6
–C2H6O
–(NH4)3PO4
For the neutral
atom…
What element is this?
What period is it in?
What group/family is it in
(name and number)?
What is the mass of this
atom?
A piece of pizza weighs 250. grams
and is 38% cheese by mass. How
many grams of cheese does it have?