Which of the following is NOT a hydrogen-like | vedclass

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Question

(C) hydrogen-like species is an atom or ion that contains only one electron. To determine this,we check the number of electrons in each species: $A) \

Vedclass · Accepted Answer

$Li^{+}$

Vedclass · Answer

(C) hydrogen-like species is an atom or ion that contains only one electron. To determine this,we check the number of electrons in each species: $A) \ Li^{2+}$: Lithium has $3$ electrons. $Li^{2+}$ has $3 - 2 = 1$ electron. It is hydrogen-like. $B) \ Be^{3+}$: Beryllium has $4$ electrons. $Be^{3+}$ has $4 - 3 = 1$ electron. It is hydrogen-like. $C) \ Li^{+}$: Lithium has $3$ electrons. $Li^{+}$ has $3 - 1 = 2$ electrons. It is $NOT$ hydrogen-like. $D) \ He^{+}$: Helium has $2$ electrons. $He^{+}$ has $2 - 1 = 1$ electron. It is hydrogen-like. Therefore,$Li^{+}$ is the correct answer.

$(i) \ _{26}Fe^{54}, \ _{26}Fe^{56}, \ _{26}Fe^{58}$	$(a) \ \text{Isotopes}$
$(ii) \ _1H^3, \ _2He^3$	$(b) \ \text{Isotones}$
$(iii) \ _{32}Ge^{76}, \ _{33}As^{77}$	$(c) \ \text{Isoelectronic}$
$(iv) \ _{92}U^{235}, \ _{90}Th^{231}$	$(d) \ \text{Isobars}$
$(v) \ _1H^1, \ _1D^2, \ _1T^3$

Which of the following is $NOT$ a hydrogen-like species?

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