POST-TEST

____1. It describe where electrons are located around nucleus of an atom.

• A. Electricity configuration

• B. Electrician configurationtion

• C. Electronic configuration

• D. Electrical configuration

____2. What element has a configuration of  1s2, 2s2, 2p6, 3s2 ,3p6 4s2 ,3d10 ,4p5 ?

• A. Bromine

• B. Lithium  

• C.  Iron   

•  D.  Oxygen

____3. It is kind of  principle that electron fill lower energy atomic orbitals before filling higher-energy ones.

• A. Aufbuu Principle

• B. Aufbiu Principle

• C. Aafbau Principle

• D. Aufbau Principle

____4. What is the noble gas shorthand electron for Sulfur atom?

 

• A. [Ar] 3p4        

• B. [Ne] 3s23p4  

• C. [He] 3s23p4      

• D. [Na] 3s23p4

 

____5. It is a grouping of electrons in a shell according to the shape of the region of space they occupy.

• A. Sub-shells            

• B. P- Subshell

• C. T- subshell          

• D. F-Subshell

____6. How many electrons can the first energy level hold?

• A. 1

• B. 8

• C. 0

• D. 2

____7. The electron configuration of an atom is 1s2, 2s2, 2p6.

The number of valence electrons in the atom is ____.

• A. 3

• B. 8

• C. 6

• D. 10

 

____8. at atom matches this electron configuration? 1s2 ,2s2 ,2p6 ,3s2, 3p4

• A. Fluorine    

• B. Sulfur

• C. Silver

• D. Manganese

____9. What  electron configuration matches  an iron ?

• A. 1s2,2s2, 2p6, 3s2,3p6, 4s2, 3d6

• B. 1s2,2s2,2p6,3s2,3p6,4s2,3d10

• C. 1s2,2s2,2p6,3s2

• D. 1s2, 2s2, 2p6 ,3s2, 3p4

___10. What atom matches this electron configuration?

1s2 ,2s2, 2p6, 3s2, 3p6, 4s2 ,3d10,4p6, 5s1

 

• A. Helium        

• B. Lithium      

• C. Hydrogen

• D. Rubidium