
1 
The electron configuration for boron is: 



1s^{2}2s^{2}2p^{3} 



1s^{2}2s^{2}2p^{1} 



1s^{2}2s^{1} 



1s^{2}2p^{3} 



None of the previous answers. 

2 
The electron configuration for sulfur is: 



1s^{2}2s^{2}2p^{6}3p^{6} 



1s^{2}2s^{2}2p^{6}3d^{6} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{4} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{2} 



None of the previous answers. 

3 
The electron configuration for manganese is: 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{5} 



1s^{2}2s^{2}2p^{6}3s^{2} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}4p^{5} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{4} 



None of the previous answers. 

4 
The electronic configuration for strontium is: 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}4d^{2} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5p^{2} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{1} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2} 



None of the previous answers. 

5 
The electronic configuration for bromine is: 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}4p^{6}5s^{2}4d^{7} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{15} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{5} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{9}4p^{6} 



None of the previous answers. 

6 
The electron configuration for argon is: 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6} 



1s^{2}2s^{2}2p^{6}3s^{2}3d^{6} 



1s^{2}2s^{2}2p^{6}3p^{6}3d^{2} 



1s^{2}2s^{2}2p^{6}3s^{8} 



None of the previous answers. 

7 
The electron configuration for arsenic is: 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}4p^{6} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{3} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{13} 



1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6} 



None of the previous answers. 

8 
The element with the electron configuration 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{6} is: 



iron 



Ni^{2+} 



manganese 



cobalt 



None of the previous answers. 

9 
1s^{2}2s^{2}2p^{6}2d^{1} could be the electron configuration of:: 



sodium 



an excited state of neon 



an impossible electron configuration 



sodium ion 



None of the previous answers. 

10 
The element with the electron configuration 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10} is 



copper 



krypton 



galium 



zinc 



None of the previous answers. 

11 
1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}4s^{1} could be the electron configuration of:: 



the ground state of potassium 



the ground state of potassium ion 



an excited state of argon 



an impossible electron configuration 



None of the previous answers. 

12 
Nickel has how many unpaired electrons? 



0 



1 



2 



3 



None of the previous answers. 

13 
Arsenic has how many unpaired electrons? 



0 



1 



2 



3 



None of the previous answers. 

14 
Sulfur has how many unpaired electrons? 



0 



1 



2 



3 



None of the previous answers. 

15 
Calcium has how many unpaired electrons? 



0 



1 



2 



3 



None of the previous answers. 

16 
Cadmium has how many unpaired electrons? 



0 



1 



2 



3 



None of the previous answers. 

17 
Neodymium has how many unpaired electrons? 



0 



3 



4 



6 



None of the previous answers. 

18 
Diamagnetic elements have no unpaired electrons and paramagnetic elements have at least one unpaired electron. Which one of the following elements would be diamagnetic? 



potassium 



barium 



tin 



iodine 



None of the previous answers. 

19 
When the quantum numbers n,l,m,s are represented by 5,0,0,1/2, the symbolism for the electron is: 



5s 



5p 



1s 



impossible set of quantum numbers 



None of the previous answers. 

20 
When the quantum numbers n,l,m,s are represented by 4,2,1,1/2, the symbolism for the electron is: 



4s 



4p 



4d 



impossible set of quantum numbers 



None of the previous answers. 

21 
When the quantum numbers n,l,m,s are represented by 3,1,0,1/2, the symbolism for the electron is: 



3s 



3p 



3d 



impossible set of quantum numbers 



None of the previous answers. 

22 
When the quantum numbers n,l,m,s are represented by 4,1,2,1/2, the symbolism for the electron is: 



4s 



4p 



4d 



impossible set of quantum numbers 



None of the previous answers. 

23 
When the quantum numbers n,l,m,s are represented by 3,3,2,1/2, the symbolism for the electron is: 



3s 



3d 



3f 



impossible set of quantum numbers 



None of the previous answers. 

24 
For a 6s electron the values of n,l,m,s respectively could be: 



6,4,4,1/2 



1,0,0,1/2 



6,1,0,1/2 



6,0,0,1/2 



None of the previous answers. 

25 
For a 4p electron the values of n,l,m,s respectively could be: 



4,1,0,1/2 



4,1,2,1/2 



4,2,2,1/2 



4,0,0,1/2 



None of the previous answers. 

26 
For a 5d electron the values of n,l,m,s respectively could be: 



5,1,0,1/2 



5,2,3,1/2 



5,2,2,1/2 



5,3,0,1/2 



None of the previous answers. 

27 
Absorption of light by an atom causes an electron to: 



be promoted from a ground state orbital to an excited orbital. 



conduct electricity. 



move into the nucleus. 



fall to a lower energy orbital. 



None of the previous answers. 
