Wednesday, August 22, 2012

chemistry

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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