1. The electron that there are in the outermost electron shell of an element is called _________

2. A vertical column in the periodic table is called a 

3. Which of the following sublevels is correctly designated?

4.  The distribution of electrons of an atom or molecule in atomic or molecular orbitals is called ____________

5.  How many electrons are there in the "p" orbitals of the last shell (principal energy) of silicon, atomic number 15?

6.  The electron configuration of N₇ is 

7. How many electrons from the outermost shell does a 5s orbital posses?

8. The "p" orbital can accommodate a maximum of ________ electrons.

9. The element with electron configuration 1s²  2s² 2p⁶ 3s² 3p⁶ 4s²  is 

10. It shows the number of sub levels by using  boxes for electrons.