fokinumber.blogg.se - Halogen elements

#HALOGEN ELEMENTS SERIES#

the force of attraction between the nucleus and the outer shell decreases.

the outer shell becomes further from the nucleus.

The less easily these anions form, the less reactive the halogen. When an element in group 7 takes part in a reaction, its atom's outer shells gain an electron and form negatively charged ions, called anions. Reveal answerĪstatine is less reactive than iodine, so it will not displace iodine from potassium iodide solution. Predict whether astatine will displace iodine from potassium iodide solution.

QuestionĪstatine is placed below iodine in group 7. This is because chlorine could displace bromine and iodine, bromine could only displace iodine, but iodine could not displace chlorine or bromine. The order of reactivity is chlorine > bromine > iodine. Use the results in the table to deduce an order of reactivity, starting with the most reactive halogen. In the table below, the following formula names are used:

A halogen cannot displace itself from a solution of one of its salts, so these three tests were not done. The table shows the results of these tests. Different combinations of halogen solution and salt solution are tested.

#HALOGEN ELEMENTS SERIES#

The result of adding iodine to the three solutions Determining a reactivity seriesĪ reactivity series can be produced by attempting some displacement reactions.