Which of the following are isoelectronic species?
Correct answer: D. F-, Ne, Na+
- A. H+, H, H-
- B. Li+, Na+, K+
- C. Cl-, Br-, I-
- D. F-, Ne, Na+
Explanation
soelectronic species are atoms or ions that have the same number of electrons. This means they have the same electronic configuration and often similar chemical properties. These are all halogens from Group 17. Each has gained one electron to achieve a stable noble gas configuration, resulting in the same number of electrons (18) and the same electronic configuration. So, they are isoelectronic.
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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