Name ______________________________ November 30, 2016	Period _________________
PRACTICE with ELECTRON CONFIGURATION        DUE FRIDAY Dec. 2, 2016

1s  2s  2p  3s  3p  4s  3d  4p  5s   
4d  5p  6s  4f  5d  6p  7s
Follow the arrows on the left

** Remember to use the periodic table for transition metals b/c their configuration do not always follow the rules stated above
1. Write the complete electron configuration for the following atoms:
	a. F   example 	1s2  2s2 2p5__________________
	b. Al _________________________________
	c. V _________________________________
	d. Cu_________________________________
	e. Kr _________________________________
2. Write the noble gas, (shorthand configuration) for the following elements: 
	a. Cd    example [Kr] 5s2 4d10 ___________
	b. I________________________________
	c. Ba _______________________________
	d. Rn ______________________________
	e. U________________________________

3. Write orbital notations for the following atoms: 
a. O   ___     ___         ___ ____ ___        ____      ___ ___ ___        ___       ___ ___ ___ ___ ____  
           1s        2s                 2p 	           3s                 3p	             4s                   3d

b. P   ___     ___         ___ ____ ___        ____      ___ ___ ___        ___       ___ ___ ___ ___ ____  
           1s        2s                      2p 	        3s                 3p	              4s                   3d

c. Cr 		 ___     ___         ___ ____ ___        ____      ___ ___ ___        ___       ___ ___ ___ ___ ____  
(an exception)        1s        2s                      2p 	            3s                 3p	      4s                      3d

d. Co     ___     ___         ___ ____ ___        ____      ___ ___ ___        ___       ___ ___ ___ ___ ____  
               1s         2s                      2p 	             3s                 3p	      4s                   3d

Practice continued 		

4. Write the complete electron configuration for the following atoms:
  	a. sodium _____________________________________________
	b. iron ________________________________________________
	Write the complete electron configuration for the following atoms:
c. bromine____________________________________________
	d. barium______________________________________________
	e. neptunium _________________________________________

5. Write the noble gas, (shorthand configuration) for the following elements:
	a. cobalt ________________________________________________
	b. silver ________________________________________________
	c. tellurium _____________________________________________
	d. radium ______________________________________________
	e. lawrencium ___________________________________________

6. Determine the elements from their electron configurations
	a. 1s2 2s2 2p6 3s2 3p4_________________________________________
	b. 1s2 2s2 2p6 3s2 3p64s2 3d104p65s1_________________________________
	c. [Kr] 5s2 4d105p3____________________________________________________
	d. [Xe] 6s24f145d6____________________________________________________
	e. [Rn] 7s2 5f11____________________________________________________

7. Determine which electron configurations are NOT valid and give your reason: (Auf Bau, Hund Rule)
	a. . 1s2 2s2 2p6 3s2 3p64s2 3d104p5
	
b. 1s2 2s2 2p6 3s2 3p64s2 3d5
	
c. [Ra]7s2 5f8
	
d. [Kr] 5s24d105p5
	
e. [Xe]