The Periodic Table

Goal:
Construct an argument based on evidence describing patterns in reactivity on the periodic table.

Agenda:
Warmup
Lab Conclusions
Card Sort

Warmup
Check your journal entry from yesterday. You should have two things completed:

1. Questions from the Bohr model card sort completed.
2. Analysis questions from the lab completed. 

If you haven't finished the questions, do it SILENTLY now. 

If you have finished the questions make sure your elbow partner is finished, then discuss your answers with your elbow partner. We will be sharing out in a few minutes. 

Lab Conclusions
Using the NGSS Crosscutting Concept of Patterns, we need to construct an explanation about how an element's position in the periodic table relates to its properties (i.e. appearance, reactivity). Come up with the following with your group:

1. A hypothesis for how the element's position on the periodic table (both row and column) relates to its properties.
2. A description of evidence from your lab that supports this hypothesis. 

Card Sort
We are going to do another card sort! Arrange the cards based on their properties (without looking at the periodic table).

Directions: Find Be, Mg, Ca, and Sr from the cards. Arrange them in a column like Mendeleev did. From the placement of these elements, arrange the cards in a table (columns, and rows). Elements in each column must have as many things in common as possible. You will observe at least four patterns for each column.

Questions (Science Journal Entry Title: The Periodic Table)

1. What do the sticks represent about these elements?

2. What were the two most significant properties of the elements that helped you form your groups and arrange your table?  Explain.
3. What characteristics did you use for sorting the cards?  Record at least 5 observations of patterns such as colors, shapes, sizes, etc… that are in each column and each row of your table.  
4. Below are 4 possible cards for the element Germanium. Where does Germanium belong in the periodic table? Which card seems most accurate to you? What is your reasoning?
   

   
5. Pick one element in the table below that you think does not belong together in the same group?  Explain your thinking with specific information provided in the table about each element.
   
   

   Cadmium Cd	Moderately soft, silvery solid, metal.	React very slowly with water.	Found in CdCl2 (s)
   Zinc Zn	Moderately hard, silvery solid, metal.	Reacts very slowly with water.	Found in ZnCl2 (s)
   Iodine I	Purple solid, nonmetal.	Reacts slowly with metals.	Found in ICl(s)
   Mercury Hg	Silvery liquid metal.	Does not react with water.	Found in HgCl2(s)