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Class 11 Tuition > Learn Classification of Elements and Periodicity in Properties > What do you understand by isoelectronic species? Name...
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What do you understand by isoelectronic species? Name a species that tvill be iso electronic with each of the following atoms or ions.
(i) F–(ii) Ar (iii) Mg2+(iv) Rb+

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The term "isoelectronic" means "equal electric", or more specifically, equal charge. Isoelectronic species are elements or ions that have the same, or equal number of electrons. This module explores that although isoelectronic species have the same number of electrons, they are different in their physical...
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The term "isoelectronic" means "equal electric", or more specifically, equal charge. Isoelectronic species are elements or ions that have the same, or equal number of electrons. This module explores that although isoelectronic species have the same number of electrons, they are different in their physical and chemical properties.

Ar is the answer

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Related Questions

The radius of Na+ cation is less than that of Na atom. Give reason.
No. Of shell in Na cation is less than na+
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Which of the following sets contain only isoelectronic ions?
(a) Zn2+, Ca2+, Ga3+, Al3+                       
(b) K+, Ca2+, Sc3+, Cl–
(c) P3-, S2- Cl–,K+                          
(d) Ti4+, Ar, Cl3+, V5+
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Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is
(a) F > Cl > Br > I
(b) F < Cl < Br < I
(c) F < Cl > Br > I
(d) F < Cl < Br > I
Answer is C as due to interelectronic repusion and small size F has less negative electron gain enthalpy than Cl
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Which of the following elements will gain one electron more readily in comparison to other elements of their group?
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(a) I>I>I+
(b) I+>I–>I
(c) i>i+>i–
(d) i– >i>i+
Correct answer is d
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