Which one of the following pairs represents isobars?
- A$_{2}^{3}He$ and $_{2}^{4}He$
- B$_{12}^{24}Mg$ and $_{12}^{25}Mg$
- C$_{19}^{40}K$ and $_{20}^{40}Ca$
- D$_{19}^{39}K$ and $_{19}^{40}K$
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Which one of the following sets of ions represents a collection of isoelectronic species? (Given: Atomic Number: $F: 9, Cl: 17, Na: 11, Mg: 12, Al: 13, K: 19, Ca: 20, Sc: 21$)
The 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 number of electrons in a neutral atom of an element is equal to its
Easy
View SolutionWhat is the number of nucleons present in an atom having $29$ electrons and $34$ neutrons in it?
The specific charge of a proton is $9.6 \times 10^7 \ C \ kg^{-1}$. What will be the specific charge for an $\alpha$-particle?
Medium
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