Bromine will be the most chemically active non-metal in Period 4.
A nonmetal is such a chemical element that typically doesn't have a lot of metallic characteristics; examples include colorless gases and glossy, solids with a high melting temperature.
Bromine is a kind of element that can be occurred in period 4 in the periodic table.
The atomic number of bromine is 35 and its electronic configuration is 2,8,18,7. it has 4 shells hence it will be placed in period 4.
Therefore, Bromine will be the most chemically active non-metal in Period 4.
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