Wednesday, December 06, 2006
Regents Class: Sample Quiz and answers
Regents: Chapters 9.1 and 9.2 in the text will give you some extra prep questions for tomorrow's quiz. The blue Barron's review book also has some questions on dot structures in the "Electronic Structure of Atoms" unit and questions about chemical formulas in sections 3.3 through 3.6.
I can't get to the website yet so I will post an extra set of questions on this blog:
1. What is the empirical formula of the following ionic compounds?
sodium sulfide, potassium phosphide, calcium perchlorate, aluminum phosphate, lithium fluoride
2. Write the charges of the cations and anions in the following compounds:
BaCl2 , CaS, CuCO3 , LiClO2
3. Draw the Lewis structures of the following atoms:
B, O, Ne, Al, Ar
answers to the above: (I don't have subscript fonts for this blog so the numbers are placed higher
or lower than they should be)
1. Na2S , K3P , Ca(ClO4)2 , AlPO4 , LiF ,
2. Ba 2+ , Cl - ; Ca 2+ , S 2- ; Cu 2+ , CO3 2- ; Li + , ClO2 - (all polyatomic ions that will be asked are on Table E of your Regents Reference Tables)
3. I can't draw structures on this blog but the dot structures for the first nineteen elements are posted here from the hw that you definitely did last week:
http://www.stanthonyshs.org/assignments/s4/113006txt7-1a.pdf
I can't get to the website yet so I will post an extra set of questions on this blog:
1. What is the empirical formula of the following ionic compounds?
sodium sulfide, potassium phosphide, calcium perchlorate, aluminum phosphate, lithium fluoride
2. Write the charges of the cations and anions in the following compounds:
BaCl2 , CaS, CuCO3 , LiClO2
3. Draw the Lewis structures of the following atoms:
B, O, Ne, Al, Ar
answers to the above: (I don't have subscript fonts for this blog so the numbers are placed higher
or lower than they should be)
1. Na2S , K3P , Ca(ClO4)2 , AlPO4 , LiF ,
2. Ba 2+ , Cl - ; Ca 2+ , S 2- ; Cu 2+ , CO3 2- ; Li + , ClO2 - (all polyatomic ions that will be asked are on Table E of your Regents Reference Tables)
3. I can't draw structures on this blog but the dot structures for the first nineteen elements are posted here from the hw that you definitely did last week:
http://www.stanthonyshs.org/assignments/s4/113006txt7-1a.pdf
# posted by C @ 5:44 PM 
