Activity: Constructing Bohr Models and Determining Trends

 Procedure:
1. Cut construction paper into 5 cm x 5 cm squares, (you will need 20)

2. On the front of the square, in the upper left corner place the atomic number, in the upper right corner place the atomic mass, in the bottom centre write the name of the element, and centred on the card write the atomic symbol. (As seen below front)

3. On the back of the square, in the upper left corner place the atomic number, in the bottom centre write the name of the element, and in centre of the card draw the Bohr diagram for the element.

4. Repeat for each of the first 20 elements
 
 
 

1         1.0079 
H
Hydrogen

  
 (Bohr Model) 

Hydrogen

Front
Back
 

Questions:
1. Look at your cards for H, Li, Na, K, what do you notice is the same?

2. Look at your cards for Be, Mg, Ca, what do you notice is the same?

3. What can be said about each of the following pairs? (B, Al) (C, Si) (N, P) (O, S) (F, Cl)

4. In general what can be said about every element in the same family of the periodic table?

5. Look at your cards for He, Ne, Ar, what do you notice?

6. Take your cards for H, He, what is similar about them?

7. Take your cards for Li, Be, B, C, N, O, F, Ne what is similar about them?

8. If you flip these cards over so that their atomic symbols are face up, what pattern do you see?

9. Take your cards for Na, Mg, Al, Si, P, S, Cl, Ar what is similar about them?

10. If you flip these cards over so that their atomic symbols are face up, what pattern do you see?

11. In general what can we say about all elements in the same period of the periodic table?