| I. \[^{\text{6}}\text{Li}\] and \[^{7}\text{Li}\] |
| II. \[^{\text{32}}\text{S}\] and \[^{\text{32}}{{\text{S}}^{2-}}\] |
| III. \[^{\text{39}}{{\text{K}}^{\text{+}}}\] and \[^{\text{40}}\text{C}{{\text{a}}^{\text{2+}}}\] |
A)
I
II
III
No. of Protons
No. of electrons
No. of Neutrons
B)
I
II
III
No. of electrons
No. of Protons
No. of neutrons
C)
I
II
III
No. of neutrons
No. of electrons
No. of protons
D)
I
II
III
No. of protons
No. of neutrons
No. of electrons
Correct Answer: C
Solution :
\[^{\text{6}}\text{Li}\] and \[^{7}\text{Li}\]: Same number of protons and electrons but different number of neutrons. \[^{\text{32}}\text{S}\] and \[^{\text{32}}{{\text{S}}^{2-}}\]: Same number of protons and neutrons but different number of electrons. \[^{\text{39}}{{\text{K}}^{\text{+}}}\] and \[^{40}\text{C}{{\text{a}}^{2+}}\]: Same number of electrons and neutrons but different number of protons.
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