A halogen cannot displace itself from a solution of one of its salts, eg potassium bromine would not displace bromine water, so these combinations are not done.

The periodic table The periodic table is a chart of all ... The three common Group 7 elements are chlorine, bromine and iodine. The word ‘halogen’ means 'salt former'. Group 0 and testing ...

There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...