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Write the formula and name of the compound formed from the
Chapter 8, Problem 69P(choose chapter or problem)
Write the formula and name of the compound formed from the following ionic interactions;(a) The 2+ ion and the 1– ion are both isoelectronic with the atoms of a chemically unreactive Period 4 element, (b) The 2+ ion and the 2? ion are both isoelectronic with the Period 3 noble gas. (c) The 2+ ion is the smallest with a filled d subshell; the anion forms from the smallest halogen, (d) The ions form from the largest and smallest ionizable atoms in Period 2.
Questions & Answers
QUESTION: Problem 69P
Write the formula and name of the compound formed from the following ionic interactions;(a) The 2+ ion and the 1– ion are both isoelectronic with the atoms of a chemically unreactive Period 4 element, (b) The 2+ ion and the 2? ion are both isoelectronic with the Period 3 noble gas. (c) The 2+ ion is the smallest with a filled d subshell; the anion forms from the smallest halogen, (d) The ions form from the largest and smallest ionizable atoms in Period 2.
ANSWER:
Solution 69P:
Step 1:
(a) The 2+ ion and the 1– ion are both isoelectronic with the atoms of a chemically unreactive Period 4 element.
Isoelectronic species are defined as the elements or ions that have the same, or equal number of electrons.
In the periodic table, period 4 belongs to K to Kr.
Among them, Sr2+ and Br- are isoelectronic in nature.
The electronic configuration of Sr2+ is [Kr] 5s0 or [Kr]
Similarly, the electronic configuration of Br- is [Ar] 3d104s24p6 or [Kr]
The formula of the compound is SrBr2.