Chemistry - Atomic Structure Question with Solution | TestHub

ChemistryAtomic StructureDiscovery of Fundamental ParticlesEasy2 minQB

ChemistryEasysingle choice

$X^{2 -}, Y^{+}$ and $Z^{2 +}$ are isoelectronic with $A r$ . The increasing order of the number of protons in $X^{2 -}, Y^{+}$ and $Z^{2 +}$ is:

Answer:

Solution:

$A r$ has 18 electrons, so each ion has 18 electrons.

$X^{2 -}$ : protons = 18 - 2 = 16. $Y^{+}$ : protons = 18 + 1 = 19. $Z^{2 +}$ : protons = 18 + 2 = 20.

Order: $X^{2 -} (16) < Y^{+} (19) < Z^{2 +}$ (20).

Answer: (C).

Stream:JEESubject:ChemistryTopic:Atomic StructureSubtopic:Discovery of Fundamental Particles

⏱ 2mℹ️ Source: QB

Loading discussions...