Free Radicals are molecules or ions that have an unpaired electron. They tend to be very reactive and are thought to contribute to the aging process.A "dimer" forms when two of the same molecules combine (dimerize).Draw a Lewis structure for each of the substances below and indicate which are free radicals. For a free radical the unpaired electron goes on the leastelectronegative element, which is usually the central atom.Key: y = Yesn = No1.022.3.NO4.BrO3

Lewis structure: Lewis structures are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. Lewis structures show each atom and its position in the structure of the molecule using the chemical symbol of atoms. Lines are drawn between atoms that are bonded to one another (pairs of dots can be used instead of lines). The electrons that not participating in bonding are represented as pairs of dots and are placed next to the atoms.The Lewis structure of O2- : Number of the valence electron in oxygen = 6 The number of the electron equal to negative charge is = 1 The total number of the electron in the lewis structure is =13 The Lewis structure of the compound is as follows:The Lewis structure of ClO2-: Number of the valence electron in oxygen = 6 Number of the valence electron in chlorine = 7 The number of the electron equal to negative charge is = 1 The total number of the electron in the lewis structure is =20 The Lewis structure of the compound is as follows:The Lewis structure of NO: Number of the valence electron in oxygen = 6 Number of the valence electron in nitrogen = 5 The total number of the electron in the lewis structure is =11 The Lewis structure of the compound is as follows:The Lewis structure of BrO3-: Number of the valence electron in oxygen = 6 Number of the valence electron in romine = 7 The number of the electron equal to negative charge is = 1 The total number of the electron in the lewis structure is =26 The Lewis structure of the compound is as follows:The species O2- and NO contains an unpaired electron, hence these species are free readical.