MCQ
Atomic number is denoted by ________.
- AA
- BX
- CZ
- DM
Explanation:
Atomic number is denoted by Z.
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$A$. $\mathrm{Be} \rightarrow \mathrm{Be}^{-}$
$B$. $\mathrm{N} \rightarrow \mathrm{N}^{-}$
$C$. $\mathrm{O} \rightarrow \mathrm{O}^{2-}$
$D$. $\mathrm{Na} \rightarrow \mathrm{Na}^{-}$
$E$. $\mathrm{Al} \rightarrow \mathrm{Al}^{-}$
Choose the most appropriate answer from the options given below :
$3p_x,\,2s,\,4d_{xy},\,3s,\,4p_z,\,3p_y,\,4s$