A) 300
B) 350
C) 465
D) 450
Correct Answer: C
Solution :
The atomic number of zinc is 30. \[\Rightarrow\] Total no. of protons \[=1+2+3+.................+30\] . Sum of first ?n? natural numbers \[=\frac{n(n+1)}{2}\] \[\Rightarrow\] Total no. of protons \[=\frac{30\times 31}{2}=15\times 31=465\]You need to login to perform this action.
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