Chlorine is an element in period 3 of the Periodic Table. Bromine is found in period 4 of the Periodic Table. These two elements may be from different periods of the periodic table, but they have many similar properties.

Explain why the properties of chlorine and bromine closely resemble one another.

Explanation

Chlorine and bromine are in the same group i.e., Group VIIA of the Periodic Table. Chlorine and bromne have seven valence electrons each. Since both have the same number of valence electrons, they have similar chemical properties. Both readily gain or share one electron to achieve a stable octet configuration.