Question

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

Answer 1

The statements about electron configurations and the periodic table are evaluated as mostly false, with only two being true. The true statements confirm that the highest quantum number for period 2 elements is 2 and that group 8A elements have filled outer shells.

Step-by-step explanation:

To classify each statement as true or false regarding electron configurations and the periodic table:

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

False: Period 4 elements have an inner electron configuration of [Ar]. They instead have an inner electron configuration ending in [Kr].

False: The valence electrons of groups 5A elements are not in the 6s subshell; they are in the 5p subshell.

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

False: Period 5 elements do not have an inner electron configuration of [Xe], but actually [Kr].

True: The valence electrons of group 2A elements are indeed in an s subshell, specifically the 'ns' subshell where 'n' is the period number.

False: The highest principal quantum number of period 3 element is 3.

False: Period 3 elements do not all have six 2p electrons. For example, Sodium (Na) has only one 3s electron beyond the 2p sublevel, hence not all elements in period 3 have filled 2p orbitals.

Answer 2

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