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Connect an atom's principal quantum number and valence electrons to its period and group location.
How principal quantum number defines the period.
An element's location in the Periodic Table reflects the quantum numbers of the last orbital filled. The period indicates the value of the principal quantum number () for the outermost or valence shell. Successive periods are associated with the filling of the next higher principal energy level.
Mapping subshells to the table layout.
A polished process flowchart illustrating the orbital filling order for the 6th period of the periodic table, showing th…
Problem 3.2 step-by-step.
Problem. How would you justify the presence of 18 elements in the 5th period of the Periodic Table?
How valence electrons define groups.
Elements located in the same vertical column (or group) of the Periodic Table have similar valence shell electronic configurations. This means they have the same number of electrons in their outermost orbitals.
Problem 3.3 step-by-step.
Problem. The elements and have not yet been discovered (or were theoretically named). In which family/group would you place these elements, and what is the electronic configuration in each case?
Exercise 3.5 applied practice.
Use your knowledge of noble gas cores and the aufbau principle. ( for Radon is a helpful starting point).
State the period number and the group number.
Show the orbital filling that leads to your conclusion.
Based on its position, what type of element do you predict it to be?
Exercise 3.4 applied practice.
On the basis of quantum numbers and the aufbau principle, which specific sequence of orbitals is filled to give the sixth period of the periodic table exactly 32 elements?