Wednesday, August 22, 2012

chemistry


Answers on next post

An atom in an excited state can have an electron configuration of

A. 1s2 2s2 
B. 1s2 2p1 
C. 1s2 2p2 
D. 1s2 2s2 2p5 
E. 1s2 2s2 2p6 

Compared to the charge and mass of a proton an electron has 

A. The same charge and smaller mass
B. The same charge and the same mass
C. The opposite charge and smaller mass
D. The opposite charge and the same mass

 What is the total number of sublevels in the fourth principal energy level? 

A. 1
B. 2
C. 3
D. 4

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