Why did Mendeleev put bromine (Br) and chlorine (Cl) in the same group on the periodic table?
They are similar alphabetically.
They have similar masses.
They have similar properties.
They are both gases.
Mendeleev put bromine and chlorine in the same group on the periodic table because they have similar properties. Specifically, they both belong to the halogen group and share characteristics such as high reactivity and the ability to form salts with metals.
so is it a b c or d
The correct answer is:
c) They have similar properties.