Question

write the name and atomic no. of the element present in the 4 period and 17 group of the periodic table?
which of the following elements belong to the same period K, Si, Be and O
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Answer 1

The element you are referring to is bromine (Br).

The element which belongs to the same period as bromine is K (Potassium)

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Answer 2

Explanation:

The atomic number present in fourth period is carbon and belongs same as L shell. The 17 period is chlorine and belongs to and belongs same as M shell.