If $A^{+}$ has $11$ protons,then the number of electrons in it is...........
- A$10$
- B$11$
- C$12$
- D$13$
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Match the following species with the correct number of electrons present in them:
Species Number of Electrons $(i) Be^{2+}$ $(a) 0$ $(ii) H^{+}$ $(b) 10$ $(iii) Na^{+}$ $(c) 2$ $(iv) Mg^{+}$ $(d) 11$
| Species | Number of Electrons |
|---|---|
| $(i) Be^{2+}$ | $(a) 0$ |
| $(ii) H^{+}$ | $(b) 10$ |
| $(iii) Na^{+}$ | $(c) 2$ |
| $(iv) Mg^{+}$ | $(d) 11$ |
Which one of the following is not an iso-electronic pair?
If the atomic weight of an element is $23$ times that of the lightest element and it has $11$ protons,then it contains
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