Question
Question: The elements with atomic numbers 9, 17, 35, 53, 85 are all :...
The elements with atomic numbers 9, 17, 35, 53, 85 are all :
A
Halogens
B
Noble gases
C
Heavy metals
D
Light metals
Answer
Halogens
Explanation
Solution
& F & Cl & Br & I & At \\
Z = & 9 & 17 & 35 & 53 & 85
\end{matrix}$$