If a neutral atom has $2, 8,$ and $5$ electrons in $K, L,$ and $M$ shells respectively,what is its atomic number?
- A$5$
- B$8$
- C$15$
- D$2$
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Similar Questions
Regarding the two isotopes $_{13}Al^{27}$ and $_{14}Si^{27}$,which of the following statements is correct?
Medium
View SolutionThe total number of isoelectronic species from the given set is $.......$
$O^{2-}, F^{-}, Al, Mg^{2+}, Na^{+}, O^{+}, Mg, Al^{3+}, F$
$O^{2-}, F^{-}, Al, Mg^{2+}, Na^{+}, O^{+}, Mg, Al^{3+}, F$
The charge on the atom containing $17$ protons,$18$ neutrons and $18$ electrons is
Isotopes are those which contain
Medium
View SolutionMatch the following species with their respective number of electrons:
| Species | Number of electrons |
| :--- | :--- |
| $(a)$ $O^{2-}$ | $(i)$ $18$ |
| $(b)$ $Li^{2+}$ | (ii) $2$ |
| $(c)$ $He$ | (iii) $10$ |
| $(d)$ $Ca^{2+}$ | (iv) $1$ |
| Species | Number of electrons |
| :--- | :--- |
| $(a)$ $O^{2-}$ | $(i)$ $18$ |
| $(b)$ $Li^{2+}$ | (ii) $2$ |
| $(c)$ $He$ | (iii) $10$ |
| $(d)$ $Ca^{2+}$ | (iv) $1$ |
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