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How many electrons can the shell with a principal quantum number of 1 hold?

 How many electrons can the shell with a principal quantum number of 1 hold? 
A. 1
B. 2
C. 4
D. 8

 

2. How many electrons can the shell with a principal quantum number of 2 hold? 
A. 1
B. 2
C. 4
D. 8

 

3. What is the ground-state electronic configuration of a nitrogen atom (nitrogen: atomic number 7)? 
A. 1s22s12p4
B. 1s22s22p3
C. 1s12s12p5
D. 1s22s22p2

 

4. What is the ground-state electronic configuration of a fluorine atom (fluorine: atomic number 9)? 
A. 1s12s12p7
B. 1s22s22p5
C. 1s22s22p6
D. 1s02s22p7

 

5. What is the ground-state electronic configuration of a fluoride anion (fluorine: atomic number 9)? 
A. 1s22s22p2
B. 1s22s22p5
C. 1s22s22p6
D. 1s22s22p7

 

6. What is the ground-state electronic configuration of a sodium cation (sodium: atomic number 11)? 
A. 1s22s22p63s1
B. 1s22s22p53s1
C. 1s22s22p6
D. 1s22s22p63s2

 

7. Which of the following species has an atom that has an unfilled valence shell of electrons? 
A. molecular hydrogen, H2
B. hydroxide anion, HO-
C. boron trifluoride, BF3
D. water, H2O

 

8. Which of the following species has an atom that has an unfilled valence shell of electrons? 
A. molecular bromine, Br2
B. fluoride anion, F-
C. ammonia, NH3
D. aluminum trichloride, AlCl3

 

9. Which of the following species possesses a formal charge? 
A. BH3
B. BH4
C. CCl4
D. H2S

 

10. Which of the following species possesses a formal charge? 
A. CCl4
B. SiCl4
C. AlCl4
D. PCl3

Dec 10 2019 View more View Less

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