The atomic number of an element is always equal to
- AAtomic weight divided by $2$
- BNumber of neutrons in the nucleus
- CWeight of the nucleus
- DElectrical charge of the nucleus
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Similar Questions
Which of the following are identical in terms of their atomic number $(Z)$?
$(i)$ $Na$ and $Na^+$
$(ii)$ $F$ and $F^-$
$(i)$ $Na$ and $Na^+$
$(ii)$ $F$ and $F^-$
Easy
View SolutionCalculate the number of protons,neutrons and electrons respectively in ${}^{14}_{7}N^{3-}$.
Match 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) $1$ |
An element with mass number $81$ contains $31.7\%$ more neutrons as compared to protons. Assign the atomic symbol.
Medium
View SolutionThe number of electrons in $[_{19}^{40}K]^{-1}$ is
Easy
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