Monday, September 28 – Please take out your review packet – Remember that today is the last day I’ll check homework!!

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Presentation transcript:

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 – Carbon dioxide – Air – Silicon – N 2 – Na 2 CO 3 – Dirt

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 – C 6 H 12 O 6 – C 2 H 6 O – (NH 4 ) 3 PO 4

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?