Electron configuration and the periodic table true and false questions?
classify each statement as true or false:

1. the highest principal quantum number of period 2 element is 2.

2. period 4 elements have an inner electron configuration of [ar]

3. the valence electrons of groups 5a elements are in the 6s subshell.

4. group 8a elements have completely full outer principal shells.

5. period 5 elements have an inner electron configuration of [xe]

6. the valence electrons of group 2a elements are in an s subshell.

7. the highest principal quantum number of period 3 element is 4

8. period 3 elements have six 2p electrons

1. The highest principal quantum number of period 2 element is 2. - True

2. Period 4 elements have an inner electron configuration of [Ar] - True

As the last element of the period 3 is argon which can be used to write the electronic configuration of the Period 4 element.

3. The valence electrons of groups 5A elements are in the 6s subshell. - False

4.Group 8A elements have completely full outer principal shells. - True

as 8A elements are the noble gas elements.

5.  Period 5 elements have an inner electron configuration of [Xe] - False

Because they have an inner electron configuration of krypton.

6. The valence electrons of group 2A elements are in an s subshell. - True.

7. The highest principal quantum number of period 3 element is 4 - False.

8. Period 3 elements have six 2p electrons - True

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