Respuesta :
Explanation:
1) The valence electrons of group 4A elements are in the 5s subshell.
The given statement is false .
The valence electrons of group 4A elements are in the ns and np subshell .Where n is equal to 1 to 7.
2) Period 3 elements have an inner electron configuration of [Ar].
The given statement is false .
The noble gas which comes before third period is neon.Period 3 elements have an inner electron configuration of [Ne].
3)The highest principal quantum number of period 4 elements is 4.
The given statement is true.
The period number of periodic table indicates the value of highest principal quantum number.
4) Period 5 elements have six 4p electrons.
The given statement is true.
This so because 4p subshell is filled before filling of shells of fifth shell. So, the 4p subshell will obviously have 6 electrons.
5) Period 5 elements have an inner electron configuration of (Kr).
The given statement is true.
The noble gas which comes before third period is krypton .
6) Group 8A elements have full outer principal s and p subshells.
The given statement is true.
This is because the the group mentioned in the statement if noble gases and noble gases are inert in nature due to fully filled electronic configurations.
7) The valence electrons of group 3A elements are in an s and p subshell.
The given statement is true.
The valence electrons of group 3A elements are in the ns and np subshell .Where n is equal to 1 to 7. there general electronic configuration is [tex]ns^2np^1[/tex].
8) The highest principal quantum number of period 4 elements is 5
The given statement is false.
The period number of periodic table indicates the value of highest principal quantum number.
The electron address in an atom can be given with the help of quantum mechanics. It helps to locate electrons with quantum numbers.
(1) The valence electrons of group 4A elements are in the 5s subshell.
The ns in group 4A can vary from 1 to 7. Thus the statement is false.
(2) Period 3 elements have an inner electron configuration of [Ar).
The nearest noble gas has been Neon, thus the inner electron configuration is of [Ne]. The statement is false.
(3) The highest principal quantum number of period 4 elements is 4.
The period number has been equal to the highest principal quantum number. Thus, the statement is true.
(4) Period 5 elements have six 4p electrons.
It has 5 subshells, and 4 subshells have been filled prior to 5s. Thus, the elements have a 4p orbital filled with 6 electrons. The statement is true.
(5) Period 5 elements have an inner electron configuration of (Kr).
The nearest noble gas has been Krypton, thus the inner electron configuration is of [Kr]. The statement is true.
(6) Group 8A elements have full outer principal s and p subshells.
Group 8A belongs to a noble gas. The subshells of noble gas are completely filled. The statement is true.
(7) The valence electrons of group 3A elements are in an s and p subshell.
The electrons of the 3A group have a general configuration [tex]\rm ns^2\;np^1[/tex]. The electrons are filled in s and p subshell. The statement is true.
(8) The highest principal quantum number of period 4 elements is 5.
The period number has been equal to the highest principal quantum number. Thus, the statement is false.
For more information about the quantum numbers, refer to the link:
https://brainly.com/question/18835321
