(a)
Interpretation:
The electron configuration of elements with two unpaired electrons and with an
Concept Introduction:
The electronic configuration is defined as the distribution of electrons in various atomic orbitals of the atom. The electrons that are present in an outermost orbital are known as valence electrons whereas those present in the orbitals with lower quantum numbers are called core electrons. The general outer electronic configuration of
Electrons are filled in orbitals in accordance with three rules: Aufbau principle, Hund’s rule, and Pauli’s exclusion principle. Aufbau principle states that electrons are filled in the orbitals from lower to higher energy level as follows:
Hund’s rule states that initially each orbital is singly occupied and then pairing occurs and Pauli’s exclusion principle states that the spin of two electrons in one orbital is always different.
(a)
Explanation of Solution
The electronic configuration for elements with an atomic number less than 10 is as follows:
According to Hund’s rule, initially each orbital is singly occupied and then pairing occurs in the filling of an electron in same subshell.
Therefore, the two unpaired electrons are present in
(b)
Interpretation:
The electron configuration of element with the largest number of unpaired electrons and with an atomic number less than 10 has to be determined.
Concept Introduction:
Refer to part (a).
(b)
Explanation of Solution
The electronic configuration for elements with an atomic number less than 10 is as follows:
According to Hund’s rule, initially each orbital is singly occupied and then pairing occurs in the filling of an electron in same subshell.
Therefore, the most unpaired electrons are contained by an element that has atomic number 7. The number of unpaired electrons is 3 and it is represented as follows:
(c)
Interpretation:
The electron configuration for those elements that have only two occupied subshells with an atomic number less than 10 has to be determined.
Concept Introduction:
Refer to part (a).
(c)
Explanation of Solution
The electronic configuration for elements with an atomic number less than 10 is as follows:
The elements that have occupied only two subshells are the elements with atomic number 3and 4.
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Chapter 7 Solutions
Chemistry: Principles and Practice
- In what main group(s) of the periodic table do elements have the following number of half-filled p-orbitals in the outermost principal energy level? (a) 0 (b) 1(c) 2(d) 3arrow_forward• identify an orbital (as 1s, 3p, etc.) from its quantum numbers, or vice versa.arrow_forwardThe configuration of an element is given here. (a) What is the identity of the element? (b) In what group and period is the element found? (c) Is the element a nonmetal, a main group element, a transition metal, a lanthanide, or an actinide? (d) Is the element diamagnetic or paramagnetic? If paramagnetic, how many unpaired electrons are there? (e) Write a complete set of quantum numbers (n, , m, ms) for each of the valence electrons. (f) What is the configuration of the 2+ ion formed from this element? Is the ion diamagnetic or paramagnetic?arrow_forward
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