
Concept explainers
(a)
Interpretation:
The number of outer-shell electrons needed for a noble-gas electron configuration is to be determinedif an otbital can have maximum of 3 electrons.
Concept introduction:
The long form of periodic table is based on the valence shell electronic configuration of elements. It consists of 18 vertical columns which are called as groups and 7 horizontal rows which are called a period. The electronic configuration of the element depends on the
It can be written by following certain rules such as Hund’s rule, Aufbau principle, and the Pauli Exclusion Principle. The Pauli Exclusion Principle state that no two electrons can have all the four same quantum numbers. Hence each orbital can accommodate a maximum of 2 electrons with opposite spin.
(b)
Interpretation:
The number of electrons shared in the covalent bondneeds to be determined, if an otbital can have maximum of 3 electrons.
Concept introduction:
The long form of periodic table is based on the valence shell electronic configuration of elements. It consists of 18 vertical columns which are called groups and 7 horizontal rows which are called a period. The electronic configuration of the element depends on the atomic number of element.
It can be written by following certain rules such as Hund’s rule, Aufbau principle, and the Pauli Exclusion Principle. The Pauli Exclusion Principle state that no two electrons can have all the four same quantum numbers. Hence, each orbital can accommodate a maximum of 2 electrons with opposite spin.
(c)
Interpretation:
The electronic configuration needs to be determined. Also, the electron dot structure of element with atomic number 12 needs to be determined, if an otbital can have maximum of 3 electrons.
Concept introduction:
The long form of periodic table is based on the valence shell electronic configuration of elements. It consists of 18 vertical columns which are called as groups and 7 horizontal rows which are called as period. The electronic configuration of element depends on the atomic number of element.
It can be written by following certain rules such as Hund’s rule, Aufbau principle, and Pauli Exclusion Principle. The Pauli Exclusion Principle state that no two electrons can have all the four same quantum numbers. Hence each orbital can accommodate maximum 2 electrons with opposite spin.
(d)
Interpretation:
The electron dot structure of X2 molecule needs to be determined, if an otbital can have maximum of 3 electrons.
Concept introduction:
The long form of periodic table is based on the valence shell electronic configuration of elements. It consists of 18 vertical columns which are called as groups and 7 horizontal rows which are called as period. The electronic configuration of element depends on the atomic number of element.
It can be written by following certain rules such as Hund’s rule, Aufbau principle, and Pauli Exclusion Principle. The Pauli Exclusion Principle state that no two electrons can have all the four same quantum numbers. Hence each orbital can accommodate maximum 2 electrons with opposite spin.

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Chapter 7 Solutions
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